diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..bb69588 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,118 @@
     "\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": 33,
+   "id": "307d4fb1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirts\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products: \n",
+    "        quantity = int(input(f\"Enter quantity for {product}: \"))\n",
+    "        inventory[product] = quantity\n",
+    "    return inventory\n",
+    "\n",
+    "def get_customer_order(inventory):\n",
+    "    customers_order = set()\n",
+    "\n",
+    "    order_input = input(\"Please enter the products you want to order, separated by commas: \")\n",
+    "    orders = [order.strip() for order in order_input.split(\",\")]\n",
+    "\n",
+    "    for product in orders:\n",
+    "        while True:\n",
+    "            if product not in inventory:\n",
+    "                print(f\"'{product}' does not exist in inventory.\")\n",
+    "                break\n",
+    "            elif inventory[product] <= 0:\n",
+    "                print(f\"'{product}' is out of stock.\")\n",
+    "                break\n",
+    "            else:\n",
+    "                customers_order.add(product)\n",
+    "                break\n",
+    "\n",
+    "    return customers_order\n",
+    "\n",
+    "def calculate_total_price(customers_order):\n",
+    "    total_price = 0\n",
+    "\n",
+    "    for product in customers_order:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                price = float(input(f\"Please enter the price of {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    print(\"Price cannot be negative.\")\n",
+    "                else:\n",
+    "                    total_price += price\n",
+    "                    break\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a numeric value.\")\n",
+    "\n",
+    "    return total_price\n",
+    "\n",
+    "def update_inventory(customers_order, inventory):\n",
+    "        for product in customers_order:\n",
+    "             if product in inventory:\n",
+    "                    inventory[product] -= 1\n",
+    "        return inventory\n",
+    "def calculate_order_statistics(customers_order, products):\n",
+    "    total_ordered = len(customers_order)\n",
+    "    percentage_ordered = total_ordered / len(products) * 100\n",
+    "    return total_ordered, percentage_ordered\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    total_ordered, percentage_ordered = order_statistics\n",
+    "    print(f\"total ordered: {total_ordered}\")\n",
+    "    print(f\"percentage ordered: {percentage_ordered: .2f}%\")\n",
+    "\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "     for product, quantity in inventory.items():\n",
+    "          print(f\"{product}: {quantity}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 35,
+   "id": "74c73c17",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "'mug' is out of stock.\n",
+      "'hate' does not exist in inventory.\n",
+      "{'book'}\n",
+      "Total price: 5.0\n",
+      "(1, 20.0)\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "customers_order = get_customer_order(inventory)\n",
+    "print(customers_order)\n",
+    "\n",
+    "total_price = calculate_total_price(customers_order)\n",
+    "print(\"Total price:\", total_price)\n",
+    "\n",
+    "stats = calculate_order_statistics(customers_order, products)\n",
+    "print(stats)\n",
+    "\n",
+    "\n"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +197,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.2"
   }
  },
  "nbformat": 4,