diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..8ad0649 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,111 @@
     "\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": "2d53dbe9",
+   "metadata": {},
+   "outputs": [],
+   "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",
+    "                    raise ValueError(\"Quantity cannot be negative.\")\n",
+    "                inventory[product] = quantity\n",
+    "                break\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Error: {e}\")\n",
+    "    return inventory\n",
+    "\n",
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"\\nEnter 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",
+    "    for _ in range(num_orders):\n",
+    "        while True:\n",
+    "            product = input(\"Enter the name of a product that a customer wants to order: \").strip().lower()\n",
+    "            if product not in inventory:\n",
+    "                print(f\"'{product}' is not in inventory. Try again.\")\n",
+    "            elif inventory[product] == 0:\n",
+    "                print(f\"'{product}' is out of stock. Try again.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                break\n",
+    "    return customer_orders\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory and inventory[product] > 0:\n",
+    "            inventory[product] -= 1\n",
+    "        elif product in inventory:\n",
+    "            print(f\"'{product}' is out of stock.\")\n",
+    "        else:\n",
+    "            print(f\"'{product}' is not available in the inventory.\")\n",
+    "\n",
+    "    inventory = {k: v for k, v in inventory.items() if v > 0}\n",
+    "    return inventory\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    unique_ordered = len([item for item in customer_orders if item in products])\n",
+    "    percentage_unique = (unique_ordered / len(products)) * 100\n",
+    "    return total_ordered, percentage_unique\n",
+    "\n",
+    "def print_order_statistics(order_stats):\n",
+    "    total_ordered, percentage_unique = order_stats\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",
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"\\nUpdated Inventory:\")\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"{product}: {quantity}\")\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",
+    "    return sum(prices.values())\n",
+    "\n",
+    "# --------- MAIN PROGRAM ---------\n",
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "customer_orders = get_customer_orders(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:.2f}\")\n"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +190,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,