diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..a3b6d4c 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +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": 1,
+   "id": "7c526425",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Quantity cannot be negative. Please enter a valid quantity.\n",
+      "\n",
+      "Order Statistics:\n",
+      "Total Products Ordered: 3\n",
+      "Percentage of Unique Products Ordered: 60.0\n",
+      "\n",
+      "Updated Inventory:\n",
+      "t-shirt: 5\n",
+      "mug: 3\n",
+      "hat: 4\n",
+      "book: 3\n",
+      "keychain: 6\n",
+      "\n",
+      "Total Price: 23.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity < 0:\n",
+    "                    print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "                    continue\n",
+    "                inventory[product] = quantity\n",
+    "                break\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid number.\")\n",
+    "    return inventory\n",
+    "\n",
+    "def get_customer_orders(products, inventory):\n",
+    "    product_map = {p.lower(): p for p in products}\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "            if num_orders < 0:\n",
+    "                raise ValueError(\"Number of orders cannot be negative.\")\n",
+    "            break\n",
+    "        except ValueError as e:\n",
+    "            print(f\"Error: {e}\")\n",
+    "\n",
+    "    count = 0\n",
+    "    while count < num_orders:\n",
+    "        product_input = input(\"Enter the name of a product that a customer wants to order: \").strip().lower()\n",
+    "        if product_input in product_map:\n",
+    "            product = product_map[product_input]\n",
+    "            if inventory.get(product, 0) > 0:\n",
+    "                customer_orders.add(product)\n",
+    "                count += 1\n",
+    "            else:\n",
+    "                print(f\"'{product}' is out of stock.\")\n",
+    "        else:\n",
+    "            print(\"Invalid product name. Please try again.\")\n",
+    "    return customer_orders\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory:\n",
+    "            inventory[product] -= 1\n",
+    "    # Remove items with 0 quantity\n",
+    "    inventory = {product: qty for product, qty in inventory.items() if qty > 0}\n",
+    "    return inventory\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percentage_unique_ordered = (total_products_ordered / len(products)) * 100 if products else 0\n",
+    "    return total_products_ordered, percentage_unique_ordered\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    total, percentage = order_statistics\n",
+    "    print(\"\\nOrder Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {total}\")\n",
+    "    print(f\"Percentage of Unique Products Ordered: {percentage:.1f}\")\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"\\nUpdated Inventory:\")\n",
+    "    [print(f\"{product}: {qty}\") for product, qty in inventory.items()]\n",
+    "\n",
+    "def calculate_total_price(customer_orders):\n",
+    "    prices = {}\n",
+    "    for product in customer_orders:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"Price cannot be negative.\")\n",
+    "                prices[product] = price\n",
+    "                break\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Error: {e}\")\n",
+    "    total_price = sum(prices.values())\n",
+    "    return total_price\n",
+    "\n",
+    "def main():\n",
+    "    products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "    inventory = initialize_inventory(products)\n",
+    "    customer_orders = get_customer_orders(products, inventory)\n",
+    "    inventory = update_inventory(customer_orders, inventory)\n",
+    "    order_stats = calculate_order_statistics(customer_orders, products)\n",
+    "    print_order_statistics(order_stats)\n",
+    "    print_updated_inventory(inventory)\n",
+    "    total_price = calculate_total_price(customer_orders)\n",
+    "    print(f\"\\nTotal Price: {total_price:.1f}\")\n",
+    "\n",
+    "# Run the program\n",
+    "main()\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "521e2a22",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +221,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.11.7"
   }
  },
  "nbformat": 4,