diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..cf5bdce 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,6 +72,174 @@
     "\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": "4367d59d-9d96-409b-9750-e32d5a984911",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a606e6f9-3c4c-4b79-9c36-09fc22d6478e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {product: int(input(f\"Enter the quantity of {product}s available: \")) for product in products}\n",
+    "    return inventory   "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f42e4e35-729c-4e49-b643-8e661aa91638",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    while True:\n",
+    "        try:\n",
+    "            number_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "\n",
+    "            if number_orders < 0:\n",
+    "                raise ValueError\n",
+    "\n",
+    "            break\n",
+    "\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid number of orders. Please enter a valid number.\")\n",
+    "\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while len(customer_orders) < number_orders:\n",
+    "        try:\n",
+    "            product = input(\"Enter a product you want to order: \")\n",
+    "\n",
+    "            if product not in inventory:\n",
+    "                raise ValueError\n",
+    "\n",
+    "            if inventory[product] <= 0:\n",
+    "                raise ValueError\n",
+    "\n",
+    "            customer_orders.add(product)\n",
+    "\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid product. Please enter a valid product with stock available.\")\n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1171e0c6-1c66-4b86-be41-3c27bc1912d8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"Price cannot be negative.\")\n",
+    "\n",
+    "                total_price += price\n",
+    "                valid_price = True\n",
+    "\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid price. Please enter a valid price.\")\n",
+    "\n",
+    "    return total_price"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ec978feb-5fcc-4aa1-b684-49e93c50eaa7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] = inventory[product] - 1\n",
+    "\n",
+    "    filtered_inventory = {\n",
+    "        product: quantity\n",
+    "        for product, quantity in inventory.items()\n",
+    "        if quantity > 0 \n",
+    "    }     \n",
+    "\n",
+    "    return filtered_inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5177e3b1-6114-4904-8777-1c108e39227f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percentage = (total_products_ordered / len(products)) * 100\n",
+    "\n",
+    "    return total_products_ordered, percentage"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6408d32-4267-4018-9406-1079a70a4b05",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(total_products_ordered, percentage):\n",
+    "    print()\n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {total_products_ordered}\")\n",
+    "    print(f\"Percentage of Unique Products Ordered: {percentage}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "14d7a82e-b64a-46f3-a44c-1f3fd9d58118",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "customer_orders = get_customer_orders(inventory)\n",
+    "\n",
+    "total_products_ordered, percentage = calculate_order_statistics(\n",
+    "    customer_orders,\n",
+    "    products\n",
+    ")\n",
+    "\n",
+    "print_order_statistics(total_products_ordered, percentage)\n",
+    "\n",
+    "inventory = update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "print()\n",
+    "print(\"Updated Inventory:\")\n",
+    "\n",
+    "[print(f\"{product}: {quantity}\") for product, quantity in inventory.items()]\n",
+    "\n",
+    "total_price = calculate_total_price(customer_orders)\n",
+    "\n",
+    "print(f\"Total Price: {total_price}\")"
+   ]
   }
  ],
  "metadata": {
@@ -90,7 +258,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,