diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..1b9c453 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,6 +72,142 @@
     "\n",
     "4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism works as expected.\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c91de722-db15-44e1-9bc5-b85b1fad9d24",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity >= 0:\n",
+    "                    inventory[product] = quantity\n",
+    "                    valid_input = True\n",
+    "                else:\n",
+    "                    print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid whole number.\")\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def get_customer_orders(inventory):\n",
+    "    # Get valid number of orders\n",
+    "    valid_num = False\n",
+    "    while not valid_num:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "            if num_orders >= 0:\n",
+    "                valid_num = True\n",
+    "            else:\n",
+    "                print(\"Number of orders cannot be negative.\")\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input! Please enter a whole number.\")\n",
+    "\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    # Get valid product names\n",
+    "    for _ in range(num_orders):\n",
+    "        valid_product = False\n",
+    "        while not valid_product:\n",
+    "            product = input(\"Enter the name of a product that a customer wants to order: \").lower().strip()\n",
+    "            \n",
+    "            if product not in inventory:\n",
+    "                print(f\"Error: '{product}' is not in the inventory. Please enter a valid product.\")\n",
+    "            elif inventory[product] <= 0:\n",
+    "                print(f\"Error: '{product}' is out of stock. Please select another product.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                valid_product = True\n",
+    "\n",
+    "    return customer_orders\n",
+    "\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    percentage_unique = (total_ordered / len(products)) * 100\n",
+    "    return total_ordered, percentage_unique\n",
+    "\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    total_ordered, percentage_unique = order_statistics\n",
+    "    print(\"\\nOrder Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {total_ordered}\")\n",
+    "    print(f\"Percentage of Unique Products Ordered: {percentage_unique:.1f}%\")\n",
+    "\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    # Step 1: Subtract 1 for ordered items\n",
+    "    updated = {\n",
+    "        product: quantity - 1 if product in customer_orders else quantity\n",
+    "        for product, quantity in inventory.items()\n",
+    "    }\n",
+    "    # Step 2: Keep only items with stock remaining\n",
+    "    return {\n",
+    "        product: quantity \n",
+    "        for product, quantity in updated.items() \n",
+    "        if quantity > 0\n",
+    "    }\n",
+    "\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"\\nUpdated Inventory:\")\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"{product}: {quantity}\")\n",
+    "\n",
+    "\n",
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0.0\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "                if price >= 0:\n",
+    "                    total_price += price\n",
+    "                    valid_price = True\n",
+    "                else:\n",
+    "                    print(\"Price cannot be negative. Please enter a valid price.\")\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a numeric value.\")\n",
+    "    return total_price\n",
+    "\n",
+    "\n",
+    "# Main Program Execution\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "# 1. Initialize inventory with input validation\n",
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "# 2. Get customer orders with validation against inventory & stock\n",
+    "customer_orders = get_customer_orders(inventory)\n",
+    "\n",
+    "# 3. Calculate and display order statistics\n",
+    "order_stats = calculate_order_statistics(customer_orders, products)\n",
+    "print_order_statistics(order_stats)\n",
+    "\n",
+    "# 4. Update and display inventory\n",
+    "inventory = update_inventory(customer_orders, inventory)\n",
+    "print_updated_inventory(inventory)\n",
+    "\n",
+    "# 5. Calculate and display total order price with input validation\n",
+    "total_price = calculate_total_price(customer_orders)\n",
+    "print(f\"\\nTotal Price: {total_price:.2f}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bca185b3-a844-4816-9a9c-0aacb30b256a",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -90,7 +226,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,