diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..f556211 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,6 +72,213 @@
     "\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": 7,
+   "id": "c849fa44",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_quantity = False\n",
+    "        while not valid_quantity:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity < 0:\n",
+    "                    raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n",
+    "                valid_quantity = True\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "        inventory[product] = quantity\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "89d035c2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory,products):\n",
+    "    \n",
+    "    while True:\n",
+    "        try:\n",
+    "            number_of_orders = int(input(\"Enter the total number of orders: \"))\n",
+    "            if number_of_orders < 1:\n",
+    "                raise ValueError (\"The number of orders must be at least 1.\")\n",
+    "            break\n",
+    "        except ValueError as e :\n",
+    "            print(f\"Invalid input. {e}\")\n",
+    "\n",
+    "    \n",
+    "    customer_orders = {}\n",
+    "\n",
+    "    for i in range (number_of_orders):\n",
+    "        while True:\n",
+    "            try:\n",
+    "                product = input(f\"Enter the name of product {i+1} that a customer wants to order: \")\n",
+    "                if product not in products:\n",
+    "                    print (f\"Error.{product} is not in available products.\")\n",
+    "                    continue \n",
+    "\n",
+    "                quantity = int(input(f\"Enter the quantity for product {i+1}: \"))\n",
+    "                if quantity < 1:\n",
+    "                    raise ValueError (\"The quantity must be at least 1.\")\n",
+    "\n",
+    "                if product in inventory and inventory[product] >= quantity:\n",
+    "                    customer_orders[product] = quantity\n",
+    "                    inventory[product] -= quantity\n",
+    "                else:\n",
+    "                    print(f\"Error. There is not enough {product} in stock.\")    \n",
+    "            except ValueError as e:\n",
+    "                print(f\"Invalid input. {e}\")\n",
+    "            break    \n",
+    "\n",
+    "    return customer_orders \n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "77c1f0da",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "\n",
+    "    for product, quantity in customer_orders.items(): \n",
+    "        while True:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "                if price < 0 or price == \"\":\n",
+    "                    raise ValueError (\"The price must be un greater than or equal to 0\")\n",
+    "                total_price += price * quantity\n",
+    "                break\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Invalid input. {e}\")\n",
+    "\n",
+    "    return total_price"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "180078bd",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total of the products: ['laptop', 'tablet', 'tv']\n",
+      "Inventory: {'laptop': 5, 'tablet': 5, 'tv': 5}\n",
+      "Invalid input. The number of orders must be at least 1.\n",
+      "Error.book is not in available products.\n",
+      "Error. There is not enough tablet in stock.\n",
+      "Number of customer orders: 0\n",
+      "Customer orders: {}\n",
+      "Total price for the customer order: 0\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Se inicializan los productos disponibles \n",
+    "products = [\"laptop\", \"tablet\", \"tv\"]\n",
+    "print(f\"Total of the products: {products}\")\n",
+    "\n",
+    "# Se inicializa el inventario con los productos\n",
+    "inventory = initialize_inventory(products)\n",
+    "print (f\"Inventory: {inventory}\")\n",
+    "\n",
+    "# Se recoge los productos que se van a pedir \n",
+    "orders = get_customer_orders(inventory,products)\n",
+    "print(f\"Number of customer orders: {len(orders)}\")\n",
+    "print(f\"Customer orders: {orders}\")\n",
+    "\n",
+    "# Se calcula el precio total de los pedidos\n",
+    "total_price = calculate_total_price(orders)\n",
+    "print(f\"Total price for the customer order: {total_price}\")\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "3287d1f1",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total of the products: ['laptop', 'tablet', 'tv']\n",
+      "Inventory: {'laptop': 5, 'tablet': 5, 'tv': 5}\n",
+      "Number of customer orders: 1\n",
+      "Customer orders: {'tv': 1}\n",
+      "Total price for the customer order: 150.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Se inicializan los productos disponibles \n",
+    "products = [\"laptop\", \"tablet\", \"tv\"]\n",
+    "print(f\"Total of the products: {products}\")\n",
+    "\n",
+    "# Se inicializa el inventario con los productos\n",
+    "inventory = initialize_inventory(products)\n",
+    "print (f\"Inventory: {inventory}\")\n",
+    "\n",
+    "# Se recoge los productos que se van a pedir \n",
+    "orders = get_customer_orders(inventory,products)\n",
+    "print(f\"Number of customer orders: {len(orders)}\")\n",
+    "print(f\"Customer orders: {orders}\")\n",
+    "\n",
+    "# Se calcula el precio total de los pedidos\n",
+    "total_price = calculate_total_price(orders)\n",
+    "print(f\"Total price for the customer order: {total_price}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "0e5c39ee",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total of the products: ['laptop', 'tablet', 'tv']\n",
+      "Inventory: {'laptop': 5, 'tablet': 5, 'tv': 5}\n",
+      "Number of customer orders: 1\n",
+      "Customer orders: {'laptop': 2}\n",
+      "Invalid input. could not convert string to float: 'doscientos'\n",
+      "Total price for the customer order: 400.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Se inicializan los productos disponibles \n",
+    "products = [\"laptop\", \"tablet\", \"tv\"]\n",
+    "print(f\"Total of the products: {products}\")\n",
+    "\n",
+    "# Se inicializa el inventario con los productos\n",
+    "inventory = initialize_inventory(products)\n",
+    "print (f\"Inventory: {inventory}\")\n",
+    "\n",
+    "# Se recoge los productos que se van a pedir \n",
+    "orders = get_customer_orders(inventory,products)\n",
+    "print(f\"Number of customer orders: {len(orders)}\")\n",
+    "print(f\"Customer orders: {orders}\")\n",
+    "\n",
+    "# Se calcula el precio total de los pedidos\n",
+    "total_price = calculate_total_price(orders)\n",
+    "print(f\"Total price for the customer order: {total_price}\")"
+   ]
   }
  ],
  "metadata": {
@@ -90,7 +297,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.4"
   }
  },
  "nbformat": 4,