diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..4e6f4ac 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,93 @@
     "\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": 1,
+   "id": "c59ec9d6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 2. Modify the `calculate_total_price` function to include error handling.\n",
+    "\n",
+    "def calculate_price(customer_orders):\n",
+    "    price_order = {}\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Introduzca el precio de {product}: \"))\n",
+    "\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"El precio no puede ser negativo.\")\n",
+    "\n",
+    "                price_order[product] = price\n",
+    "                valid_price = True\n",
+    "\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}. Introduzca un precio válido.\")\n",
+    "\n",
+    "    return sum(price_order.values())\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "5fb5664d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 3. Modify the `get_customer_orders` function to include error handling.\n",
+    "\n",
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    # PEDIR NÚMERO DE PRODUCTOS \n",
+    "    valid_number = False\n",
+    "    while not valid_number:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"¿Cuántos productos desea pedir?: \"))\n",
+    "\n",
+    "            if num_orders <= 0:\n",
+    "                raise ValueError(\"El número debe ser mayor que 0.\")\n",
+    "\n",
+    "            valid_number = True\n",
+    "\n",
+    "        except ValueError as error:\n",
+    "            print(f\"Error: {error}. Introduzca un número válido.\")\n",
+    "\n",
+    "    # INTRODUCIR CADA PRODUCTO \n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = False\n",
+    "\n",
+    "        while not valid_product:\n",
+    "            product = input(f\"Producto {i+1}: \").lower()\n",
+    "\n",
+    "            # Validar que el producto existe\n",
+    "            if product not in inventory:\n",
+    "                print(\"Error: producto no existe en el inventario.\")\n",
+    "                continue\n",
+    "\n",
+    "            # Validar que hay stock disponible\n",
+    "            if inventory[product] <= 0:\n",
+    "                print(\"Error: no queda stock de ese producto.\")\n",
+    "                continue\n",
+    "\n",
+    "            # Si todo OK, lo añadimos\n",
+    "            customer_orders.add(product)\n",
+    "            valid_product = True\n",
+    "\n",
+    "    return customer_orders\n"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +172,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.7"
   }
  },
  "nbformat": 4,