diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000000..7322a6d698
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,3 @@
+# Code of Conduct
+
+Be respectful to others. This project follows a Contributor Covenant-style code of conduct. Harassment, hate speech, or other abusive behavior will not be tolerated.
\ No newline at end of file
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000000..6c3ed68b7c
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,9 @@
+# Contributing
+
+Thanks for your interest in contributing to this project!
+
+- Fork the repository and create a feature branch
+- Make your changes and commit with clear messages
+- Open a pull request describing your changes
+
+Please keep changes focused and add tests where helpful.
\ No newline at end of file
diff --git a/README.md b/README.md
index 5884e26a5b..5132b57831 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,42 @@
-# coding-project-template
\ No newline at end of file
+# e-plantShopping
+
+This repository contains the e-plantShopping demo application (React + Vite) used for learning Redux and basic frontend patterns.
+
+Contents:
+- `src/` - React source files
+- `public/` - static assets
+- `LICENSE` - Apache 2.0 license
+
+How to run locally
+
+1. Install dependencies:
+
+```powershell
+npm install
+```
+
+2. Start dev server:
+
+```powershell
+npm run dev
+```
+
+3. Open the app in the browser (typically http://localhost:5173)
+
+Simple interest script
+
+There is a helper shell script `simple-interest.sh` which calculates simple interest.
+
+Usage:
+
+```powershell
+# on Unix/macOS
+./simple-interest.sh <principal> <rate> <time>
+
+# Example
+./simple-interest.sh 1000 5 2
+```
+
+License
+
+This project is licensed under the Apache 2.0 License - see the `LICENSE` file for details.
\ No newline at end of file
diff --git a/simple-interest.sh b/simple-interest.sh
new file mode 100644
index 0000000000..b835a92868
--- /dev/null
+++ b/simple-interest.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# simple-interest.sh - calculate simple interest
+# Usage: ./simple-interest.sh <principal> <rate> <time>
+
+if [ "$#" -ne 3 ]; then
+  echo "Usage: $0 <principal> <rate> <time>"
+  exit 1
+fi
+
+P=$1
+R=$2
+T=$3
+
+# calculate simple interest: (P * R * T) / 100
+SI=$(echo "scale=2; ($P * $R * $T) / 100" | bc)
+
+echo "Simple Interest: $SI"
diff --git a/src/CartItem.jsx b/src/CartItem.jsx
index e06317433f..1ad4b8e46a 100644
--- a/src/CartItem.jsx
+++ b/src/CartItem.jsx
@@ -1,4 +1,4 @@
-import React from 'react';
+/* eslint-disable react/prop-types */
 import { useSelector, useDispatch } from 'react-redux';
 import { removeItem, updateQuantity } from './CartSlice';
 import './CartItem.css';
@@ -9,27 +9,45 @@ const CartItem = ({ onContinueShopping }) => {
 
   // Calculate total amount for all products in the cart
   const calculateTotalAmount = () => {
- 
+    // Sum over each item's subtotal (quantity * numeric cost)
+    return cart.reduce((sum, item) => {
+      const price = parseFloat(String(item.cost).replace(/[^0-9.]/g, '')) || 0;
+      const qty = item.quantity || 0;
+      return sum + price * qty;
+    }, 0).toFixed(2);
   };
 
   const handleContinueShopping = (e) => {
-   
+    e.preventDefault();
+    if (onContinueShopping) onContinueShopping(e);
   };
 
 
 
   const handleIncrement = (item) => {
+    const newQty = (item.quantity || 0) + 1;
+    dispatch(updateQuantity({ name: item.name, quantity: newQty }));
   };
 
   const handleDecrement = (item) => {
-   
+    const currentQty = item.quantity || 0;
+    if (currentQty > 1) {
+      dispatch(updateQuantity({ name: item.name, quantity: currentQty - 1 }));
+    } else {
+      // If quantity would drop to 0, remove the item from cart
+      dispatch(removeItem(item.name));
+    }
   };
 
   const handleRemove = (item) => {
+    dispatch(removeItem(item.name));
   };
 
   // Calculate total cost based on quantity for an item
   const calculateTotalCost = (item) => {
+    const price = parseFloat(String(item.cost).replace(/[^0-9.]/g, '')) || 0;
+    const qty = item.quantity || 0;
+    return (price * qty).toFixed(2);
   };
 
   return (
diff --git a/src/CartSlice.js b/src/CartSlice.js
new file mode 100644
index 0000000000..99b65dfcc9
--- /dev/null
+++ b/src/CartSlice.js
@@ -0,0 +1,40 @@
+import { createSlice } from '@reduxjs/toolkit';
+
+export const CartSlice = createSlice({
+  name: 'cart',
+  initialState: {
+    items: [], // Initialize items as an empty array
+  },
+  reducers: {
+    addItem: (state, action) => {
+      // action.payload should be a product object
+      const product = action.payload;
+      // If the product already exists in cart (by name), increase quantity, else push new
+      const existingIndex = state.items.findIndex(item => item.name === product.name);
+      if (existingIndex !== -1) {
+        state.items[existingIndex].quantity = (state.items[existingIndex].quantity || 1) + 1;
+      } else {
+        state.items.push({ ...product, quantity: 1 });
+      }
+    },
+    removeItem: (state, action) => {
+      const name = action.payload;
+      state.items = state.items.filter(item => item.name !== name);
+    },
+    updateQuantity: (state, action) => {
+      const { name, quantity } = action.payload;
+      const idx = state.items.findIndex(item => item.name === name);
+      if (idx !== -1) {
+        state.items[idx].quantity = quantity;
+        if (quantity <= 0) {
+          state.items.splice(idx, 1);
+        }
+      }
+
+    },
+  },
+});
+
+export const { addItem, removeItem, updateQuantity } = CartSlice.actions;
+
+export default CartSlice.reducer;
diff --git a/src/CartSlice.jsx b/src/CartSlice.jsx
index 32b8761ed0..deb529a9a2 100644
--- a/src/CartSlice.jsx
+++ b/src/CartSlice.jsx
@@ -1,23 +1,3 @@
-import { createSlice } from '@reduxjs/toolkit';
-
-export const CartSlice = createSlice({
-  name: 'cart',
-  initialState: {
-    items: [], // Initialize items as an empty array
-  },
-  reducers: {
-    addItem: (state, action) => {
-    
-    },
-    removeItem: (state, action) => {
-    },
-    updateQuantity: (state, action) => {
-
-    
-    },
-  },
-});
-
-export const { addItem, removeItem, updateQuantity } = CartSlice.actions;
-
-export default CartSlice.reducer;
+// Re-export to keep compatibility with existing imports
+export { default } from './CartSlice.js';
+export { addItem, removeItem, updateQuantity } from './CartSlice.js';
diff --git a/src/ProductList.jsx b/src/ProductList.jsx
index 7682c04fc4..98203e97a7 100644
--- a/src/ProductList.jsx
+++ b/src/ProductList.jsx
@@ -1,9 +1,11 @@
-import React, { useState, useEffect } from 'react';
+/* eslint-disable react/prop-types */
+import { useState } from 'react';
 import './ProductList.css'
 import CartItem from './CartItem';
+import { useDispatch, useSelector } from 'react-redux';
+import { addItem } from './CartSlice';
 function ProductList({ onHomeClick }) {
     const [showCart, setShowCart] = useState(false);
-    const [showPlants, setShowPlants] = useState(false); // State to control the visibility of the About Us page
 
     const plantsArray = [
         {
@@ -233,6 +235,19 @@ function ProductList({ onHomeClick }) {
         textDecoration: 'none',
     }
 
+    const dispatch = useDispatch();
+    const cartItems = useSelector(state => state.cart.items);
+
+    // total number of items (sum of quantities)
+    const calculateTotalQuantity = () => {
+        return cartItems ? cartItems.reduce((total, item) => total + (item.quantity || 0), 0) : 0;
+    };
+
+    const itemsInCartByName = cartItems.reduce((acc, item) => {
+        acc[item.name] = true;
+        return acc;
+    }, {});
+
     const handleHomeClick = (e) => {
         e.preventDefault();
         onHomeClick();
@@ -244,8 +259,8 @@ function ProductList({ onHomeClick }) {
     };
     const handlePlantsClick = (e) => {
         e.preventDefault();
-        setShowPlants(true); // Set showAboutUs to true when "About Us" link is clicked
-        setShowCart(false); // Hide the cart when navigating to About Us
+        // Show plants view and ensure cart is hidden
+        setShowCart(false);
     };
 
     const handleContinueShopping = (e) => {
@@ -269,19 +284,58 @@ function ProductList({ onHomeClick }) {
                 </div>
                 <div style={styleObjUl}>
                     <div> <a href="#" onClick={(e) => handlePlantsClick(e)} style={styleA}>Plants</a></div>
-                    <div> <a href="#" onClick={(e) => handleCartClick(e)} style={styleA}><h1 className='cart'><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" id="IconChangeColor" height="68" width="68"><rect width="156" height="156" fill="none"></rect><circle cx="80" cy="216" r="12"></circle><circle cx="184" cy="216" r="12"></circle><path d="M42.3,72H221.7l-26.4,92.4A15.9,15.9,0,0,1,179.9,176H84.1a15.9,15.9,0,0,1-15.4-11.6L32.5,37.8A8,8,0,0,0,24.8,32H8" fill="none" stroke="#faf9f9" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" id="mainIconPathAttribute"></path></svg></h1></a></div>
+                    <div style={{ position: 'relative' }}>
+                        <a href="#" onClick={(e) => handleCartClick(e)} style={styleA}>
+                            <h1 className='cart'>
+                                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" id="IconChangeColor" height="68" width="68">
+                                    <rect width="156" height="156" fill="none"></rect>
+                                    <circle cx="80" cy="216" r="12"></circle>
+                                    <circle cx="184" cy="216" r="12"></circle>
+                                    <path d="M42.3,72H221.7l-26.4,92.4A15.9,15.9,0,0,1,179.9,176H84.1a15.9,15.9,0,0,1-15.4-11.6L32.5,37.8A8,8,0,0,0,24.8,32H8" fill="none" stroke="#faf9f9" strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" id="mainIconPathAttribute"></path>
+                                </svg>
+                            </h1>
+                        </a>
+                        {calculateTotalQuantity() > 0 && (
+                            <span style={{ position: 'absolute', right: 6, top: 6, background: 'red', color: 'white', borderRadius: '50%', padding: '4px 7px', fontSize: '12px' }}>{calculateTotalQuantity()}</span>
+                        )}
+                    </div>
                 </div>
             </div>
             {!showCart ? (
                 <div className="product-grid">
-
-
+                    {plantsArray.map((categoryObj) => (
+                        <div key={categoryObj.category} className="category-block">
+                            <h2>{categoryObj.category}</h2>
+                            <div className="category-plants">
+                                {categoryObj.plants.map((plant) => (
+                                    <div className="product-card" key={plant.name}>
+                                        <h3 className="product-name">{plant.name}</h3>
+                                        <img src={plant.image} alt={plant.name} className="product-image" />
+                                        <p className="product-desc">{plant.description}</p>
+                                        <p className="product-cost">{plant.cost}</p>
+                                        <button
+                                            className="add-to-cart"
+                                            onClick={() => handleAddToCart(plant)}
+                                            disabled={!!itemsInCartByName[plant.name]}
+                                        >
+                                            {itemsInCartByName[plant.name] ? 'Added' : 'Add to Cart'}
+                                        </button>
+                                    </div>
+                                ))}
+                            </div>
+                        </div>
+                    ))}
                 </div>
             ) : (
                 <CartItem onContinueShopping={handleContinueShopping} />
             )}
         </div>
     );
+
+    function handleAddToCart(plant) {
+        // Dispatch the selected plant to the cart slice
+        dispatch(addItem(plant));
+    }
 }
 
 export default ProductList;