diff --git a/app/(tabs)/_layout.tsx b/app/(tabs)/_layout.tsx
index a3fb5d5..5148202 100644
--- a/app/(tabs)/_layout.tsx
+++ b/app/(tabs)/_layout.tsx
@@ -10,7 +10,7 @@ import { setupStore } from '../store';
 export default function TabLayout() {
   const colorScheme = useColorScheme();
   const store = setupStore({
-    products: fixtures
+    products: fixtures.map(p => p.asObject)
   });
   return (
     <Provider store={store}>
diff --git a/app/(tabs)/index.tsx b/app/(tabs)/index.tsx
index e0f8fe6..1a9e66e 100644
--- a/app/(tabs)/index.tsx
+++ b/app/(tabs)/index.tsx
@@ -23,17 +23,23 @@ export default function HomeScreen() {
       if (!activeProduct) return;
       const l = Number.parseInt(length);
       const w = Number.parseInt(width);
-      console.log("l=%d, w=%d", l, w);
+      // console.log("l=%d, w=%d", l, w);
       const u = units;
       const d: dimensions_t = activeProduct.area ? { l, w, u } : { l, u };
-      const p = activeProduct.priceFor(d);
-      console.log("set price %s", p);
-      const s = p.toLocaleString(undefined, {
-        minimumFractionDigits: 2,
-        maximumFractionDigits: 2,
-      })
-      setPrice(s == "NaN" ? "0.00" : s);
-    }, 10);
+      try {
+        const p = activeProduct.priceFor(d);
+        console.log("set price %s", p);
+        const s = p.toLocaleString(undefined, {
+          minimumFractionDigits: 2,
+          maximumFractionDigits: 2,
+        })
+        setPrice(s == "NaN" ? "0.00" : s);
+      } catch (err) {
+        console.log(activeProduct);
+        console.error(err)
+        return null;
+      }
+    }, 50);
     return function () {
       clearInterval(iv);
     }
@@ -67,13 +73,13 @@ export default function HomeScreen() {
                   <Text style={styles.unitHints}>{units}</Text>
                 </View>)
               }
+              <View style={styles.unitSelector}>
+                <Button title="in" onPress={() => setUnits("in")} color={units === "in" ? "gray" : "blue"} />
+                <Button title="ft" onPress={() => setUnits("ft")} color={units === "ft" ? "gray" : "blue"} />
+              </View>
             </View>
           ) : (<Text>Please choose a product</Text>)}
         </View>
-        <View style={styles.unitSelector}>
-          <Button title="in" onPress={() => setUnits("in")} color={units === "in" ? "gray" : "blue"} />
-          <Button title="ft" onPress={() => setUnits("ft")} color={units === "ft" ? "gray" : "blue"} />
-        </View>
       </View>
       <FlatList
         data={products}
diff --git a/app/store.ts b/app/store.ts
index 7be757c..939e7c7 100644
--- a/app/store.ts
+++ b/app/store.ts
@@ -3,14 +3,14 @@ import { configureStore } from '@reduxjs/toolkit';
 import { rememberReducer, rememberEnhancer } from 'redux-remember';
 import reducers from "@/features/product/productSlice"
 import AsyncStorage from '@react-native-async-storage/async-storage';
-import { Product, } from "@/lib/product";
+import { Product, ProductData, } from "@/lib/product";
 
 const rememberedKeys = ['products'];
 
 const rootReducer = reducers;
 
 export function setupStore(preloadedState = {
-    products: [] as Product[],
+    products: [] as ProductData[],
 }) {
     return configureStore({
         reducer: rememberReducer(reducers),
diff --git a/components/ProductAttributeEditor.tsx b/components/ProductAttributeEditor.tsx
index a36fec4..f555a1e 100644
--- a/components/ProductAttributeEditor.tsx
+++ b/components/ProductAttributeEditor.tsx
@@ -4,31 +4,44 @@ import React from "react";
 import { useState } from "react";
 import { StyleSheet, Text, TextInput, TouchableHighlight, View } from "react-native";
 
-export type ProductAttributeChangeFunc = (product_id: string, key: string, newValue: string) => any;
-export type ProductAttributeDeleteFunc = (product_id: string, key: string) => any;
+export type ProductAttributeChangeFunc = (key: string, newValue: string) => any;
+export type ProductAttributeDeleteFunc = (key: string) => any;
+export type ChangeAttributeFunction = (oldKey : string, newKey : string) => any;
 
-export type ProductAttributeProps = { product: Product, attributeKey: string, attributeValue: string, onChange?: ProductAttributeChangeFunc, onDelete?: ProductAttributeChangeFunc, };
+export type ProductAttributeProps = {
+    attributeKey: string,
+    attributeValue: string,
+    onChangeAttributeKey?: ChangeAttributeFunction,
+    onChangeAttribute?: ProductAttributeChangeFunc,
+    onDelete?: ProductAttributeChangeFunc,
+};
 
-export const ProductAttributeEditor = ({ product, attributeKey: key, attributeValue: value, onDelete, onChange }: ProductAttributeProps) => {
-    const [doEdit, setDoEdit] = useState(true);
-    const [newValue, setNewValue] = useState(value);
+export const ProductAttributeEditor = ({ attributeKey, attributeValue, onDelete, onChangeAttributeKey, onChangeAttribute }: ProductAttributeProps) => {
 
-    const doChange = (e: any) => {
-        setNewValue(e);
-        onChange && onChange(product.id, key, e);
+    const doChangeKey = (e: any) => {
+        onChangeAttributeKey && onChangeAttributeKey(attributeKey, e);
+    }
+
+    const doChangeValue = (e: any) => {
+        onChangeAttribute && onChangeAttribute(attributeKey, e);
     }
 
     return (
         <View>
             <View style={styles.productAttributeRow}>
-                <Text style={styles.key}>{key}</Text>
                 <TextInput
-                    value={newValue}
-                    onChangeText={doChange}
+                    defaultValue={attributeKey}
+                    onChangeText={doChangeKey}
+                    style={styles.value}
+                    aria-label="Edit Key"
+                    />
+                <TextInput
+                    defaultValue={attributeValue}
+                    onChangeText={doChangeValue}
                     style={styles.value}
                     aria-label="Edit Value" />
                 <TouchableHighlight
-                    onPress={() => onDelete && onDelete(product.id, key, value)}
+                    onPress={() => onDelete && onDelete(attributeKey, attributeValue)}
                     aria-label="Delete Attribute"
                     style={{ backgroundColor: "darkred", borderRadius: 5, margin: 5, padding: 5, }}>
                     <Ionicons name="trash-bin-outline" size={30} color={"white"} />
diff --git a/components/ProductEditor.tsx b/components/ProductEditor.tsx
index 3d4cef1..58e4253 100644
--- a/components/ProductEditor.tsx
+++ b/components/ProductEditor.tsx
@@ -1,6 +1,6 @@
 import { useAppDispatch, useAppSelector } from "@/app/store"
-import { deleteProduct, selectProducts, updateProduct } from "@/features/product/productSlice"
-import { Product } from "@/lib/product";
+import { addAttribute, changeKey, deleteAttribute, deleteProduct, selectProductIds, selectProducts, updateAttribute, updateDimensions, updatePrice, updateProduct } from "@/features/product/productSlice"
+import { Id, Product, dimensions_t } from "@/lib/product";
 import { FlatList, SafeAreaView, StyleSheet, Text } from "react-native";
 import { ProductEditorItem } from "./ProductEditorItem";
 
@@ -13,23 +13,50 @@ export const ProductEditor = ({}) => {
         dispatch(deleteProduct(product_id));
     }
 
-    function onProductUpdated(product_id: string, product: Product) {
-        dispatch(updateProduct(product));
+    function onAttributeDelete(product_id: string, attribute: string) {
+        dispatch(deleteAttribute({product_id: product_id, attribute}));
     }
 
+    function onAttributeUpdated(product_id: string, attribute: string, value: string) {
+        dispatch(updateAttribute({product_id, attributeKey: attribute, attributeValue: value}));
+    }
+
+    function onAttributeAdded(product_id: Id) {
+        console.log("Adding attribute to %s", product_id);
+        dispatch(addAttribute(product_id));
+    }
+
+    function onPriceUpdated(product_id: string, pricePerUnit: number) {
+        dispatch(updatePrice({product_id, pricePerUnit}));
+    }
+
+    function onAttributeKeyChanged(product_id : string, oldKey : string, newKey : string) {
+        dispatch(changeKey({product_id, oldKey, newKey}))
+    }
+
+    function onDimensionUpdated(product_id: string, dimensions: dimensions_t) {
+        dispatch(updateDimensions({product_id, dimensions}));
+    }
 
     return (
         <SafeAreaView>
             <h1 style={styles.h1}>Edit Products</h1>
             <FlatList
             data={products}
+            keyExtractor={(p, i) => `product-${p.id}`}
             renderItem={
                 ({item}) => {
+
                     return (
                         <ProductEditorItem
                         product={item}
                         onProductDeleted={onProductDeleted}
-                        onProductUpdated={onProductUpdated}
+                        onAttributeDeleted={onAttributeDelete}
+                        onAttributeKeyChanged={onAttributeKeyChanged}
+                        onAttributeUpdated={onAttributeUpdated}
+                        onAttributeAdded={onAttributeAdded}
+                        onPriceUpdated={onPriceUpdated}
+                        onDimensionsUpdated={onDimensionUpdated}
                         />
                     )
                 }
diff --git a/components/ProductEditorItem.tsx b/components/ProductEditorItem.tsx
index 7f455d5..0d06222 100644
--- a/components/ProductEditorItem.tsx
+++ b/components/ProductEditorItem.tsx
@@ -1,41 +1,86 @@
-import { Product } from "@/lib/product"
+import { Id, Product, dimensions_t } from "@/lib/product"
 import { useState } from "react"
-import { FlatList, StyleSheet, Text, TouchableHighlight, View } from "react-native"
+import { Button, FlatList, StyleSheet, Text, Touchable, TouchableHighlight, View } from "react-native"
 import { ProductAttributeEditor } from "./ProductAttributeEditor";
 import { TextInput } from "react-native-gesture-handler";
+import { useAppSelector } from "@/app/store";
+import rfdc from "rfdc";
+import SelectDropdown from "react-native-select-dropdown";
+import { Ionicons } from "@expo/vector-icons";
 
-export type ProductUpdatedFunc = (product_id: string, product: Product) => any;
-export type ProductDeletedFunc = (product_id: string) => any;
+export type ProductAddedFunc = () => any;
+export type ProductDeletedFunc = (product_id: Id) => any;
+export type AttributeAddedFunc = (product_id: Id) => any;
+export type AttributeKeyUpdatedFunc = (product_id: Id, oldKey: string, newKey: string) => any;
+export type AttributeUpdatedFunc = (product_id: Id, attribute: string, value: string) => any;
+export type AttributeDeletedFunc = (product_id: Id, attribute: string) => any;
+export type PriceUpdatedFunc = (product_id: Id, price: number) => any;
+export type DimensionUpdatedFunc = (product_id: Id, dimension: dimensions_t) => any;
 
 export type ProductEditorItemProps = {
     product: Product,
-    onProductUpdated?: ProductUpdatedFunc,
+    onProductAdded?: ProductAddedFunc,
     onProductDeleted?: ProductDeletedFunc,
+    onAttributeAdded?: AttributeAddedFunc,
+    onAttributeKeyChanged?: AttributeKeyUpdatedFunc,
+    onAttributeUpdated?: AttributeUpdatedFunc,
+    onAttributeDeleted?: AttributeDeletedFunc,
+    onPriceUpdated?: PriceUpdatedFunc,
+    onDimensionsUpdated?: DimensionUpdatedFunc,
 }
 
-export const ProductEditorItem = ({ product, onProductUpdated, onProductDeleted }: ProductEditorItemProps) => {
+export const ProductEditorItem = (props: ProductEditorItemProps) => {
 
     const [showAttributes, setShowAttributes] = useState(false);
-    const [doEditName, setDoEditName] = useState(false);
-    const [newName, setNewName] = useState(product.attributes.name || `Product ${product.id}`);
+    const product = props.product;
 
-    function updateName(name : string) {
-        setNewName(name);
-        product.attributes["name"] = name;
-        onProductUpdated && onProductUpdated(product.id, product);
+    function onAttributeChanged(key: string, newValue: string) {
+        props.onAttributeUpdated && props.onAttributeUpdated(product.id, key, newValue);
     }
 
-    function onAttributeChanged(product_id: string, key: string, newValue: string) {
-        product.attributes[key] = newValue;
-        onProductUpdated && onProductUpdated(product_id, product);
-
+    function onAttributeKeyChanged(oldKey: string, newKey: string) {
+        props.onAttributeKeyChanged && props.onAttributeKeyChanged(product.id, oldKey, newKey);
     }
 
-    function onAttributeDelete(product_id: string, key: string) {
-        product.removeAttribute(key);
-        onProductDeleted && onProductDeleted(product_id);
+    function onAttributeDelete(key: string) {
+        props.onAttributeDeleted && props.onAttributeDeleted(product.id, key);
     }
 
+    function onPricePerUnitChange(pricePerUnit: string) {
+        props.onPriceUpdated && props.onPriceUpdated(product.id, parseFloat(pricePerUnit) || parseInt(pricePerUnit));
+    }
+
+    function onUnitsChanged(newUnits: "foot" | "inch") {
+        props.onDimensionsUpdated && props.onDimensionsUpdated(product.id, {
+            ...((product.area || product.length) as dimensions_t),
+            u: newUnits,
+        })
+    }
+
+    function onChangeLength(len: string) {
+        const l = parseFloat(len) || parseInt(len);
+        props.onDimensionsUpdated && props.onDimensionsUpdated(product.id, {
+            ...((product.area || product.length) as dimensions_t),
+            l,
+        })
+    }
+
+    function onChangeWidth(width: string) {
+        const w = parseFloat(width) || parseInt(width);
+        props.onDimensionsUpdated && props.onDimensionsUpdated(product.id, {
+            ...((product.area || product.length) as dimensions_t),
+            w,
+        })
+    }
+
+    function onDeleteProduct() {
+        props.onProductDeleted && props.onProductDeleted(product.id);
+    }
+
+    const length = new String(product.area?.l || product.length?.l || "0") as string;
+    const width = new String(product.area?.w || "") as string;
+    const dimension = product.area?.u || product.length?.u || "foot";
+
     return (
         <View>
             <TouchableHighlight
@@ -43,24 +88,67 @@ export const ProductEditorItem = ({ product, onProductUpdated, onProductDeleted
                 aria-label="Product Item"
                 style={styles.productItemName}
             >
-                <Text style={styles.productNameText}>{newName}</Text>
+                <Text style={styles.productNameText}>{product.attributes.name || `Product ${product.id}`}</Text>
+            </TouchableHighlight>
+            <TouchableHighlight
+                onPress={() => onDeleteProduct()}
+                aria-label="delete product"
+                style={styles.deleteProductHighlight}
+                >
+                    <Ionicons style={styles.deleteProductButton} name="trash-outline" />
             </TouchableHighlight>
             {showAttributes &&
                 (
-                    <FlatList
-                        style={styles.productAttributesList}
-                        data={product.attributesAsList}
-                        renderItem={({ item }) => (
-                            <ProductAttributeEditor
-                                product={product}
-                                attributeKey={item.key || "some key"}
-                                attributeValue={item.value}
-                                onChange={onAttributeChanged}
-                                onDelete={onAttributeDelete}
+                    <View>
+                        <View style={styles.priceSpecWrapper}>
+                            <Text style={styles.priceLabel}></Text>
+                            <TextInput inputMode="decimal"
+                                defaultValue={new String(product.pricePerUnit) as string}
+                                aria-label="price per unit"
+                                onChangeText={onPricePerUnitChange}
+                                style={styles.priceInput}
                             />
-                        )}
-                        keyExtractor={(item) => `${product.id}-${item.key}`}
-                    />
+                            <Text style={styles.per}>per</Text>
+                            <Text style={styles.unitsLabel}>Units: </Text>
+                            <select
+                                onChange={(e) => onUnitsChanged(e.target.value as "foot" | "inch")}
+                                style={styles.unitsSelect}
+                                aria-label="units">
+                                <option value="foot" selected={dimension === "foot"}>feet</option>
+                                <option value="inch" selected={dimension === "inch"}>inches</option>
+                            </select>
+                            <TextInput
+                                inputMode="decimal"
+                                defaultValue={length}
+                                onChangeText={onChangeLength}
+                                style={styles.lengthInput}
+                                aria-label="length"
+                            />
+                            <Text>x</Text>
+                            <TextInput
+                                inputMode="decimal"
+                                defaultValue={width}
+                                onChangeText={onChangeWidth}
+                                style={styles.widthInput}
+                                aria-label="width"
+                            />
+                        </View>
+                        <Button title="+ Add Attribute" onPress={() => props.onAttributeAdded && props.onAttributeAdded(product.id)} />
+                        <FlatList
+                            style={styles.productAttributesList}
+                            data={Object.entries(product.attributes)}
+                            renderItem={({ item }) => (
+                                <ProductAttributeEditor
+                                    attributeKey={item[0] || "some key"}
+                                    attributeValue={item[1]}
+                                    onChangeAttributeKey={onAttributeKeyChanged}
+                                    onChangeAttribute={onAttributeChanged}
+                                    onDelete={onAttributeDelete}
+                                />
+                            )}
+                            keyExtractor={(item, i) => `${product.id}-${i}`}
+                        />
+                    </View>
                 )
             }
         </View>
@@ -68,6 +156,36 @@ export const ProductEditorItem = ({ product, onProductUpdated, onProductDeleted
 }
 
 const styles = StyleSheet.create({
+    deleteProductHighlight: {
+
+    },
+    deleteProductButton: {
+
+    },
+    priceSpecWrapper: {
+
+    },
+    priceLabel: {
+
+    },
+    priceInput: {
+
+    },
+    per: {
+
+    },
+    unitsLabel: {
+
+    },
+    unitsSelect: {
+
+    },
+    lengthInput: {
+
+    },
+    widthInput: {
+
+    },
     productNameText: {
         paddingLeft: 10,
         paddingRight: 10,
diff --git a/components/__tests__/ProductAttributeEditor-test.tsx b/components/__tests__/ProductAttributeEditor-test.tsx
index b531148..99b78b8 100644
--- a/components/__tests__/ProductAttributeEditor-test.tsx
+++ b/components/__tests__/ProductAttributeEditor-test.tsx
@@ -6,10 +6,12 @@ import React from "react";
 import { emitTypingEvents } from "@testing-library/react-native/build/user-event/type/type";
 
 describe("Product editor tests", () => {
+    const productName = "Fun Product";
     it("Product attributes can be deleted", async () => {
         const product = new Product(
             100,
-            area("squareFoot", 4 * 7)
+            {l: 100, u: "foot"},
+            {"name" : productName}
         );
         const onChange = jest.fn();
         const onDelete = jest.fn();
@@ -18,7 +20,7 @@ describe("Product editor tests", () => {
                 attributeKey="name"
                 attributeValue="product"
                 product={product}
-                onChange={onChange}
+                onChangeAttribute={onChange}
                 onDelete={onDelete}
             />);
         expect(screen.getByLabelText("Delete Attribute")).not.toBeNull();
@@ -26,25 +28,28 @@ describe("Product editor tests", () => {
         expect(onDelete).toHaveBeenCalled();
     });
     it("Product attributes can be modified", async () => {
-        const productName = "Fun Product";
         const product = new Product(
             100,
-            area("squareFoot", 4 * 7),
-            { name: productName },
+            {l: 100, u: "foot"},
+            {"name" : productName}
         );
         const onChange = jest.fn();
         const onDelete = jest.fn();
+        const onKeyChange = jest.fn();
         render(
             <ProductAttributeEditor
-                attributeKey="Name"
-                attributeValue="product"
-                product={product}
-                onChange={onChange}
+                attributeKey="old test key"
+                attributeValue="old test value"
+                onChangeAttribute={onChange}
                 onDelete={onDelete}
+                onChangeAttributeKey={onKeyChange}
             />);
-        fireEvent.press(screen.getByText("product")); // Use getByText instead of findByText
+        fireEvent.changeText(screen.getByLabelText("Edit Key"), "new test key");
+        expect(onKeyChange).toHaveBeenCalled();
         fireEvent.changeText(screen.getByLabelText("Edit Value"), "new name");
         expect(onChange).toHaveBeenCalled();
+        fireEvent.press(screen.getByLabelText("Delete Attribute"));
+        expect(onDelete).toHaveBeenCalled();
     })
 
 })
\ No newline at end of file
diff --git a/components/__tests__/ProductEditor-test.tsx b/components/__tests__/ProductEditor-test.tsx
index 0d0152e..bda8c83 100644
--- a/components/__tests__/ProductEditor-test.tsx
+++ b/components/__tests__/ProductEditor-test.tsx
@@ -1,25 +1,51 @@
 import { renderWithProviders } from "@/lib/rendering";
 import { ProductEditor } from "@/components/ProductEditor";
-import {products as fixtures} from "@/__fixtures__/initialProducts";
-import { screen } from "@testing-library/react-native";
+import { act, fireEvent, screen } from "@testing-library/react-native";
 import { selectProducts } from "@/features/product/productSlice";
+import { Product } from "@/lib/product";
 
 describe("ProductEditor", () => {
+    const productName = "Flooring"
+    const mockProduct = new Product(
+        25,
+        { l: 4, w: 8, u: "foot" },
+        { name: productName },
+    )
     it("renders correctly", async () => {
-        const {store} = renderWithProviders(<ProductEditor />, {
-            products: fixtures,
+        const { store } = renderWithProviders(<ProductEditor />, {
+            products: [
+                mockProduct.asObject,
+            ],
         });
 
         const state1 = store.getState();
 
-        const products = selectProducts(state1);
+        let products = selectProducts(state1);
 
-        expect(products).toHaveLength(6);
+        expect(products).toHaveLength(1);
 
         // Check if the product names are rendered
         expect(screen.getByText(products[0].attributes.name as string)).toBeTruthy();
-        expect(screen.getByText(products[1].attributes.name as string)).toBeTruthy();
-        expect(screen.getByText(products[2].attributes.name as string)).toBeTruthy();
-        expect(screen.getByText(products[3].attributes.name as string)).toBeTruthy();
+
+        // Start to edit a product
+        fireEvent.press(screen.getByText(productName));
+
+        // Change properties of the product to make sure it's updated in the store
+
+        act(() => {
+            fireEvent.changeText(screen.getByLabelText("length"), "16");
+        })
+        products = selectProducts(store.getState());
+        expect(products[0].dimensions.l).toBe(16);
+        act(() => {
+            fireEvent.changeText(screen.getByLabelText("width"), "32");
+        })
+        products = selectProducts(store.getState());
+
+        expect(products[0].dimensions.w).toBe(32);
+
+        fireEvent.press(screen.getByLabelText("delete product"));
+        products = selectProducts(store.getState());
+        expect(products.length).toBe(0);
     });
 });
diff --git a/components/__tests__/ProductEditorItem-test.tsx b/components/__tests__/ProductEditorItem-test.tsx
index d23d88b..bd5e002 100644
--- a/components/__tests__/ProductEditorItem-test.tsx
+++ b/components/__tests__/ProductEditorItem-test.tsx
@@ -3,22 +3,36 @@ import { render, fireEvent, screen } from '@testing-library/react-native';
 import { ProductEditorItem } from '../ProductEditorItem';
 import { Product } from '@/lib/product';
 import { area } from 'enheter';
+import { renderWithProviders } from '@/lib/rendering';
 
 describe('ProductEditorItem', () => {
+  const productName = "Product 1";
   const mockProduct = new Product(
     25,
-    area("squareFoot", 4 * 8),
-    {"name": "Product 1"},
+    {l: 4, u: 'feet'},
+    {"name": productName},
   )
 
-  const mockOnProductUpdated = jest.fn();
+  const onAttributeAdded = jest.fn();
   const mockOnProductDeleted = jest.fn();
+  const onAttributeDeleted = jest.fn();
+  const onAttributeKeyChanged = jest.fn();
+  const onAttributeUpdated = jest.fn();
+  const onProductAdded = jest.fn();
+  const onPriceUpdated = jest.fn();
+  const onDimensionUpdated = jest.fn();
 
   it('renders correctly', () => {
     render(
       <ProductEditorItem
         product={mockProduct}
-        onProductUpdated={mockOnProductUpdated}
+        onAttributeAdded={onAttributeAdded}
+        onAttributeDeleted={onAttributeDeleted}
+        onAttributeKeyChanged={onAttributeKeyChanged}
+        onAttributeUpdated={onAttributeUpdated}
+        onProductAdded={onProductAdded}
+        onPriceUpdated={onPriceUpdated}
+        onDimensionsUpdated={onDimensionUpdated}
         onProductDeleted={mockOnProductDeleted}
       />
     );
@@ -26,15 +40,37 @@ describe('ProductEditorItem', () => {
   });
 
   it('calls onProductUpdated when TouchableHighlight is pressed', () => {
-    render(
+    const {store} = renderWithProviders(
       <ProductEditorItem
         product={mockProduct}
-        onProductUpdated={mockOnProductUpdated}
+        onAttributeAdded={onAttributeAdded}
+        onAttributeDeleted={onAttributeDeleted}
+        onAttributeKeyChanged={onAttributeKeyChanged}
+        onAttributeUpdated={onAttributeUpdated}
+        onProductAdded={onProductAdded}
+        onPriceUpdated={onPriceUpdated}
+        onDimensionsUpdated={onDimensionUpdated}
         onProductDeleted={mockOnProductDeleted}
-      />
+      />, {
+        products: [mockProduct],
+      }
     );
     fireEvent.press(screen.getByText("Product 1"));
-    expect(screen.getByText('name')).toBeTruthy();
-    expect(screen.getAllByText('Product 1').length).toEqual(2);
+    expect(screen.getByLabelText("units")).toBeTruthy();
+    expect(screen.getByLabelText("Edit Key")).toBeTruthy();
+    expect(screen.getAllByLabelText("Edit Value").length).toEqual(1);
+
+    // Now start modifying the properties.
+    fireEvent.changeText(screen.getByLabelText("price per unit"), "40.00");
+    expect(onPriceUpdated).toHaveBeenCalled();
+    
+    fireEvent.changeText(screen.getByLabelText("length"), "12");
+    expect(onDimensionUpdated).toHaveBeenCalled();
+    
+    fireEvent.changeText(screen.getByLabelText("width"), "12");
+    expect(onDimensionUpdated).toHaveBeenCalled();
+    
+    fireEvent.press(screen.getByLabelText("delete product"));
+    expect(mockOnProductDeleted).toHaveBeenCalled();
   });
 });
diff --git a/features/product/productSlice.ts b/features/product/productSlice.ts
index 1f32689..905307c 100644
--- a/features/product/productSlice.ts
+++ b/features/product/productSlice.ts
@@ -1,17 +1,36 @@
 import { createSelector, createSlice, PayloadAction } from '@reduxjs/toolkit';
-import { Id, Product } from '@/lib/product';
+import { area_t, dimensions_t, Id, length_t, Product, ProductData } from '@/lib/product';
 import uuid from "react-native-uuid";
 import { RootState } from '@/app/store';
+import { classToPlain, plainToClass } from 'class-transformer';
 
 const initialState = {
-    products: [] as Product [],
+    products: [] as ProductData[],
 }
 
+export type UpdateAttribute = {
+    product_id: Id,
+    attributeKey: string,
+    attributeValue: any,
+}
+
+export type UpdateAttributeKey = {
+    product_id: Id,
+    oldKey: string,
+    newKey: string,
+}
+
+export type AddAttribute = {
+    product_id: Id,
+}
+
+const cp = (obj: any) => JSON.parse(JSON.stringify(obj));
+
 const productsState = createSlice({
     name: 'products-slice',
     initialState,
     reducers: {
-        createProduct(state, action: PayloadAction<Product>) {
+        createProduct(state, action: PayloadAction<ProductData>) {
             if (!state) {
                 return initialState
             }
@@ -20,39 +39,129 @@ const productsState = createSlice({
             state.products = [...state.products, action.payload];
             return state;
         },
-        updateProduct(state, action: PayloadAction<Product>) {
-            if (!state) return initialState;
-            const product = action.payload;
-            if (!product.id) {
-                throw new Error("Product has no ID");
-            }
-            state.products = state.products.map((prod) => {
-                return prod.id === product.id ? product : prod;
-            })
-            return state;
-        },
         deleteProduct(state, action: PayloadAction<Id>) {
             if (!state) return initialState;
-            state.products = state.products.filter((prod) => {
-                prod.id !== action.payload;
-            })
+            return {
+                ...state,
+                products: [...state.products.filter((prod) => {
+                    return prod.id?.valueOf() !== action.payload.valueOf();
+                })],
+            }
+        },
+        updateAttribute(state, action: PayloadAction<UpdateAttribute>) {
+            const { product_id, attributeKey, attributeValue } = action.payload
+            if (!state) return initialState;
+            return {
+                ...state,
+                products: state.products.map(prod => {
+                    if (prod.id !== product_id) return prod;
+                    const attributes = cp(prod.attributes);
+                    attributes[attributeKey] = attributeValue;
+                    return {
+                        ...prod,
+                        attributes,
+                    }
+                })
+            };
+        },
+        changeKey(state, action: PayloadAction<UpdateAttributeKey>) {
+            if (!state) return initialState;
+            const { product_id, oldKey, newKey } = action.payload
+
+            return {
+                ...state,
+                products: state.products.map(prod => {
+                    if (prod.id !== product_id) return prod;
+
+                    const attributes = cp(prod.attributes);
+                    attributes[newKey] = attributes[oldKey];
+                    delete attributes[oldKey];
+                    attributes.id = prod.id;
+                    return {
+                        ...prod,
+                        attributes,
+                    }
+                })
+            };
+        },
+        addAttribute(state, action: PayloadAction<Id>) {
+            if (!state) return initialState;
+            const product_id = action.payload;
+            state.products = state.products.map(prod => {
+                if (prod.id !== product_id) return prod;
+                const i = (Object.keys(prod.attributes || {}).filter(k => k.match(/attribute [\d]+/)) || []).length;
+                const newAttribute = `attribute ${i + 1}`;
+                return {
+                    ...prod,
+                    attributes: {
+                        ...prod.attributes,
+                        [newAttribute]: `value`,
+                    }
+                }
+            });
             return state;
-        }
+        },
+
+        deleteAttribute(state, action: PayloadAction<{ product_id: Id, attribute: string }>) {
+            if (!state) return initialState;
+            const { product_id, attribute } = action.payload;
+            return {
+                ...state,
+                products: state.products.map(prod => {
+                    if (prod.id !== product_id) return prod;
+                    const attributes = Object.fromEntries(Object.entries(prod).filter(([k, v]) => (k !== attribute)));
+                    return {
+                        ...prod,
+                        attributes,
+                    }
+                }),
+            };
+        },
+        updatePrice(state, action: PayloadAction<{ product_id: Id, pricePerUnit: number }>) {
+            if (!state) return initialState;
+            const { product_id, pricePerUnit } = action.payload;
+            state.products = state.products.map(prod => {
+                if (prod.id !== product_id) return prod;
+                prod.pricePerUnit = pricePerUnit;
+                return prod;
+            });
+            return state;
+        },
+        updateDimensions(state, action: PayloadAction<{ product_id: Id, dimensions: dimensions_t }>) {
+            if (!state) return initialState;
+            const { product_id, dimensions } = action.payload;
+            console.log("Changing dimensions: %o", action.payload);
+            return {
+                ...state,
+                products: state.products.map(prod => {
+                    if (prod.id !== product_id) return prod;
+                    return {
+                        ...prod,
+                        dimensions,
+                    }
+                }),
+            };
+        },
+
     }
 });
 
-export const selectProducts = (state : RootState) => {
-    return state.products;
+export const selectProducts = (state: RootState) => {
+    return state.products.map(Product.fromObject);
 }
 
-export const productIds = (state : RootState) => {
-    return state.products.map(p => p.id);
-}
-
-export const getProductById = (state : RootState, id : Id) => {
-    return state.products.find(x => x.id === id);
-}
+export const selectProductIds = createSelector([selectProducts], products => {
+    return products.map(p => p.id);
+})
 
+export const selectProductAttributes = createSelector([selectProducts], products => {
+    return Object.fromEntries(products.map(p => {
+        return [
+            p.id,
+            p.attributesAsList,
+        ]
+    }))
+})
 
 export const actions = {
     ...productsState.actions
@@ -60,8 +169,13 @@ export const actions = {
 
 export const {
     createProduct,
-    updateProduct,
     deleteProduct,
+    changeKey,
+    updateAttribute,
+    addAttribute,
+    deleteAttribute,
+    updatePrice,
+    updateDimensions,
 } = productsState.actions;
 
 export default productsState.reducer;
diff --git a/lib/product.ts b/lib/product.ts
index 7768db3..343d01d 100644
--- a/lib/product.ts
+++ b/lib/product.ts
@@ -1,5 +1,6 @@
 import uuid from "react-native-uuid";
 import convert, { Area, Length } from "convert";
+import { Transform } from "class-transformer";
 
 export type Id = string;
 
@@ -14,18 +15,6 @@ export type ProductAttributes = {
     currency?: Currency,
     // [index:string]: any,
 }
-
-export type ProductData = {
-    id?: Id,
-    pricePerUnit: number,
-    measurement: {
-        unit: string,
-        value: number,
-        dimension: number,
-    },
-    attributes?: ProductAttributes,
-};
-
 export type length_t = {
     l: number, u: Length
 }
@@ -36,67 +25,76 @@ export type area_t = length_t & {
 
 export type dimensions_t = area_t | length_t;
 
+export type ProductData = {
+    id?: Id,
+    pricePerUnit: number,
+    dimensions: dimensions_t,
+    attributes?: ProductAttributes,
+};
+
+
 export type product_type_t = "area" | "length";
 
 export const isArea = (d: dimensions_t) => ("width" in d);
 export const isLength = (d: dimensions_t) => (!("width" in d));
 export const dimensionType = (d: dimensions_t) => isArea(d) ? "area" : "length"
 
-export class Product {
-    public id: string;
-    public area?: area_t;
-    public length?: length_t;
-    public presentUnits: Length;
+export function matchDimensions(d1: dimensions_t, d2: dimensions_t) {
+    if (!
+        (
+            (isArea(d1) && isArea(d2)) ||
+            (isLength(d1) && isLength(d2))
+        )
+    ) {
+        throw new Error(`Dimension mismatch: ${JSON.stringify(d1)} / ${JSON.stringify(d1)}`);
+    }
 
-    constructor(public pricePerUnit: number, dimensions: dimensions_t, public attributes: ProductAttributes = {},) {
-        this.id = attributes.id || uuid.v4().toString();
-        this.presentUnits = dimensions.u;
-        if ("w" in dimensions) {
-            this.area = {
-                l: convert(dimensions.l, dimensions.u).to("meter"),
-                w: convert(dimensions.w, dimensions.u).to("meter"),
-                u: "meter"
-            }
-        } else {
-            this.length = {
-                l: convert(dimensions.l, dimensions.u).to("meter"),
-                u: "meter"
-            };
-        }
+    return {
+        l: convert(d1.l, d1.u).to(d2.u),
+        u: d2.u,
+        ...(
+            "w" in d1 ?
+                { w: convert(d1.w, d1.u).to(d2.u), }
+                : {}
+        )
+    }
+}
+
+export function dimensionArea(d: dimensions_t) {
+    return "w" in d ? d.w * d.l : 0;
+}
+
+export class Product {
+
+    public id? : Id;
+
+    constructor(public pricePerUnit: number, public dimensions: dimensions_t, public attributes: ProductAttributes = {},
+        id?: Id,
+    ) {
+        this.id = id || uuid.v4().toString();
     }
 
     public priceFor(dimensions: dimensions_t): number {
-        if (this.area && "w" in dimensions) {
-            const thisA = this.area.l * this.area.w;
-            const otherA = convert(
-                dimensions.w,
-                dimensions.u
-            ).to("meter") * convert(
-                dimensions.l,
-                dimensions.u
-            ).to("meter");
-            return (otherA / thisA) * this.pricePerUnit;
-        } if (this.length) {
-            const thisL = this.length.l;
-            const otherL = convert(
-                dimensions.l,
-                dimensions.u
-            ).to("meter");
-            return (otherL / thisL) * this.pricePerUnit;
-        }
-        throw new Error(`Invalid dimensions: ${dimensions}`);
+        const dim = matchDimensions(dimensions, this.dimensions);
+        return (
+            dim.w ? dimensionArea(dim) / dimensionArea(this.dimensions) * this.pricePerUnit
+                : (dim.l / this.dimensions.l) * this.pricePerUnit
+        )
     }
 
     get priceDisplay() {
-        const u = this.presentUnits;
-        if (this.area) {
-            const w = Math.round(convert(this.area.w, this.area.u).to(this.presentUnits));
-            const l = Math.round(convert(this.area.l, this.area.u).to(this.presentUnits));
-            return `$ ${this.pricePerUnit} / ${l} x ${w} ${u}`;
-        } else if (this.length) {
-            const l = Math.round(convert(this.length.l, this.length.u).to(this.presentUnits));
-            return `$ ${this.pricePerUnit} per ${l} ${u}`;
-        }
+        return this.pricePerUnit.toLocaleString(undefined, {
+            minimumFractionDigits: 2,
+            maximumFractionDigits: 2,
+        })
+    }
+
+    get pricePerUnitDisplay() {
+        const p = this.priceDisplay;
+        const {l, u} = this.dimensions;
+        const w = (this.dimensions as area_t).w || null;
+        const d = w ? `${l}${u} x ${l}${u}` : `${l}${u}`;
+        return `$${p} per ${d}`
     }
 
     get attributesAsList() {
@@ -106,6 +104,30 @@ export class Product {
     }
 
     public removeAttribute(key: string) {
-        delete this.attributes[key];
+        this.attributes = Object.fromEntries(
+            Object.entries(this.attributes).filter(
+                ([k, v]) => {
+                    k == key;
+                }
+            )
+        );
+    }
+
+    get asObject() : ProductData {
+        return {
+            id: this.id,
+            pricePerUnit: this.pricePerUnit,
+            dimensions: this.dimensions,
+            attributes: this.attributes,
+        }
+    }
+
+    static fromObject({id, pricePerUnit, dimensions, attributes} : ProductData) {
+        return new Product(
+            pricePerUnit,
+            dimensions,
+            attributes,
+            id,
+        )
     }
 }
\ No newline at end of file
diff --git a/lib/rendering.tsx b/lib/rendering.tsx
index e024156..a7c1827 100644
--- a/lib/rendering.tsx
+++ b/lib/rendering.tsx
@@ -2,7 +2,7 @@ import { RenderOptions, render } from "@testing-library/react-native";
 import { PropsWithChildren, ReactElement } from "react";
 import { Provider } from "react-redux";
 import { setupStore, RootState } from "@/app/store";
-import { Product } from "@/lib/product";
+import { Product, ProductData } from "@/lib/product";
 
 export interface ExtendedRenderOptions extends Omit<RenderOptions, 'queries'> {
     preloadedState?: Partial<RootState>;
@@ -12,7 +12,7 @@ export interface ExtendedRenderOptions extends Omit<RenderOptions, 'queries'> {
 export function renderWithProviders(
     ui: ReactElement,
     preloadedState = {
-        products: [] as Product []
+        products: [] as ProductData []
     },
     extendedRenderOptions: ExtendedRenderOptions = {},
 ) {
diff --git a/lib/util.ts b/lib/util.ts
new file mode 100644
index 0000000..e69de29
diff --git a/package.json b/package.json
index 0ed4848..fdcebd6 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "@reduxjs/toolkit": "^2.2.5",
     "@testing-library/react-native": "^12.5.1",
     "@types/js-quantities": "^1.6.6",
+    "class-transformer": "^0.5.1",
     "convert": "^5.3.0",
     "enheter": "^1.0.27",
     "esm": "link:@types/js-quantities/esm",
@@ -42,10 +43,12 @@
     "react-native-reanimated": "~3.10.1",
     "react-native-safe-area-context": "4.10.1",
     "react-native-screens": "3.31.1",
+    "react-native-select-dropdown": "^4.0.1",
     "react-native-uuid": "^2.0.2",
     "react-native-web": "~0.19.12",
     "react-redux": "^9.1.2",
     "redux-remember": "^5.1.0",
+    "rfdc": "^1.4.1",
     "safe-units": "^2.0.1",
     "uuid": "^10.0.0"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7ed4d65..b6cca4c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -29,6 +29,9 @@ dependencies:
   '@types/js-quantities':
     specifier: ^1.6.6
     version: 1.6.6
+  class-transformer:
+    specifier: ^0.5.1
+    version: 0.5.1
   convert:
     specifier: ^5.3.0
     version: 5.3.0
@@ -95,6 +98,9 @@ dependencies:
   react-native-screens:
     specifier: 3.31.1
     version: 3.31.1(react-native@0.74.2)(react@18.2.0)
+  react-native-select-dropdown:
+    specifier: ^4.0.1
+    version: 4.0.1
   react-native-uuid:
     specifier: ^2.0.2
     version: 2.0.2
@@ -107,6 +113,9 @@ dependencies:
   redux-remember:
     specifier: ^5.1.0
     version: 5.1.0(redux@5.0.1)
+  rfdc:
+    specifier: ^1.4.1
+    version: 1.4.1
   safe-units:
     specifier: ^2.0.1
     version: 2.0.1
@@ -4187,6 +4196,10 @@ packages:
   /cjs-module-lexer@1.3.1:
     resolution: {integrity: sha512-a3KdPAANPbNE4ZUv9h6LckSl9zLsYOP4MBmhIPkRaeyybt+r4UghLvq+xw/YwUcC1gqylCkL4rdVs3Lwupjm4Q==}
 
+  /class-transformer@0.5.1:
+    resolution: {integrity: sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw==}
+    dev: false
+
   /clean-stack@2.2.0:
     resolution: {integrity: sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==}
     engines: {node: '>=6'}
@@ -8838,6 +8851,10 @@ packages:
       warn-once: 0.1.1
     dev: false
 
+  /react-native-select-dropdown@4.0.1:
+    resolution: {integrity: sha512-t4se17kALFcPb9wMbxig5dS1BE3pWRC6HPuFlM0J2Y6yhB1GsLqboy6an6R9rML8pRuGIJIxL29cbwEvPQwKxQ==}
+    dev: false
+
   /react-native-uuid@2.0.2:
     resolution: {integrity: sha512-5ypj/hV58P+6VREdjkW0EudSibsH3WdqDERoHKnD9syFWjF+NfRWWrJb2sa3LIwI5zpzMvUiabs+DX40WHpEMw==}
     engines: {node: '>=10.0.0', npm: '>=6.0.0'}
@@ -9219,6 +9236,10 @@ packages:
     resolution: {integrity: sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==}
     engines: {iojs: '>=1.0.0', node: '>=0.10.0'}
 
+  /rfdc@1.4.1:
+    resolution: {integrity: sha512-q1b3N5QkRUWUl7iyylaaj3kOpIT0N2i9MqIEQXP73GVsN9cw3fdx8X63cEmWhJGi2PPCF23Ijp7ktmd39rawIA==}
+    dev: false
+
   /rimraf@2.4.5:
     resolution: {integrity: sha512-J5xnxTyqaiw06JjMftq7L9ouA448dw/E7dKghkP9WpKNuwmARNNg+Gk8/u5ryb9N/Yo2+z3MCwuqFK/+qPOPfQ==}
     deprecated: Rimraf versions prior to v4 are no longer supported