diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index 3e50ef8..4e730fb 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -41,18 +41,155 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "4e700675",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\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",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid quantity.\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3b95c616",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = initialize_inventory(products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0cfbd8a4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        product = input(\"Which product do you want to order? \")\n",
+    "        if product not in inventory:\n",
+    "            print(\"That product does not exist. Try again.\")\n",
+    "        elif inventory[product] == 0:\n",
+    "            print(\"Sorry, that product is out of stock.\")\n",
+    "        else:\n",
+    "            customer_orders.add(product)\n",
+    "            break\n",
+    "\n",
+    "        \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d19b76e2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    try:\n",
+    "        for product in customer_orders:\n",
+    "            if product not in inventory:\n",
+    "                raise KeyError(f\"{product} no existe en el inventario\")\n",
+    "            if inventory[product] <= 0:\n",
+    "                raise ValueError(f\"Sin stock para {product}\")\n",
+    "            inventory[product] -= 1\n",
+    "\n",
+    "    except KeyError as e:\n",
+    "        print(\"Error de producto:\", e)\n",
+    "    except TypeError:\n",
+    "        print(\"Error: inventory debe ser un diccionario y customer_orders una lista\")\n",
+    "    except ValueError as e:\n",
+    "        print(\"Error de stock:\", e)\n",
+    "    else:\n",
+    "        print(\"Inventario actualizado correctamente\")\n",
+    "    finally:\n",
+    "        print(\"Proceso de actualización finalizado\")\n",
+    "    return inventory\n",
+    "\n",
+    "inventory = update_inventory(customer_orders, inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "47ea01b7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    try:\n",
+    "        total_orders = len(customer_orders)\n",
+    "        total_percentage = (total_orders / len(products)) * 100\n",
+    "    except ZeroDivisionError:\n",
+    "        print(\"Error: la lista de productos está vacía\")\n",
+    "        return total_orders, 0\n",
+    "    except TypeError:\n",
+    "        print(\"Error: los argumentos deben ser listas\")\n",
+    "    else:\n",
+    "        return total_orders, total_percentage\n",
+    "\n",
+    "total_orders, total_percentage = calculate_order_statistics(customer_orders, products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4b8e7cfb",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "order_statistics = calculate_order_statistics(customer_orders, products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a5eaf9c9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    total_orders, total_percentage = order_statistics\n",
+    "    print(\"Total orders: \", total_orders)\n",
+    "    print(\"Total percentage of products ordered: \", total_percentage)"
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -66,7 +203,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.2"
   }
  },
  "nbformat": 4,