diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..17f856e 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,156 @@
     "\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": "3585b1e1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#1\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "\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",
+    "\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid quantity.\")\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "70351c19",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    valid_number = False\n",
+    "\n",
+    "    while not valid_number:\n",
+    "        try:\n",
+    "            number_of_orders = int(input(\"How many items would you like to order? \"))\n",
+    "\n",
+    "            if number_of_orders > 0:\n",
+    "                valid_number = True\n",
+    "            else:\n",
+    "                print(\"Number of orders must be positive. Please try again.\")\n",
+    "\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter a valid number.\")\n",
+    "\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    for _ in range(number_of_orders):\n",
+    "        valid_product = False\n",
+    "\n",
+    "        while not valid_product:\n",
+    "            try:\n",
+    "                product = input(\n",
+    "                    \"Enter a product name (t-shirt, mug, hat, book, keychain): \"\n",
+    "                ).lower()\n",
+    "\n",
+    "                if product not in inventory:\n",
+    "                    raise ValueError(\"Invalid product name.\")\n",
+    "\n",
+    "                if inventory[product] <= 0:\n",
+    "                    raise ValueError(\"Product is out of stock.\")\n",
+    "\n",
+    "                customer_orders.add(product)\n",
+    "                valid_product = True\n",
+    "\n",
+    "            except ValueError as error:\n",
+    "                print(error)\n",
+    "                print(\"Please enter a valid product name with stock available.\")\n",
+    "\n",
+    "    return customer_orders\n",
+    "\n",
+    "\n",
+    "customer_orders = get_customer_orders(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cabce962",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\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",
+    "                    total_price += price\n",
+    "                    valid_price = True\n",
+    "                else:\n",
+    "                    print(\"Price cannot be negative. Please enter a valid price.\")\n",
+    "\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a numeric price.\")\n",
+    "\n",
+    "    return total_price\n",
+    "\n",
+    "\n",
+    "total_price = calculate_total_price(customer_orders)\n",
+    "print(f\"Total Price: {total_price}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "480c4ba5",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f69a11f1",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "70ed2e18",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +235,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.7"
   }
  },
  "nbformat": 4,