diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..1fdda1a 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,305 @@
     "\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": "markdown",
+   "id": "449644e8",
+   "metadata": {},
+   "source": [
+    "1. The implementation of your code for managing customer orders assumes that the user will always enter a valid input. \n",
+    "\n",
+    "For example, we could modify the `initialize_inventory` function to include error handling.\n",
+    "   - If the user enters an invalid quantity (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the quantity for that product.\n",
+    "   - Use a try-except block to handle the error and continue prompting the user until a valid quantity is entered."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "e1925ab1",
+   "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": 5,
+   "id": "3f6ebb2b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = {}\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"pen\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "6892227c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Error: invalid literal for int() with base 10: ' '\n",
+      "Error: invalid literal for int() with base 10: 'k'\n",
+      "Error: invalid literal for int() with base 10: '1.6'\n",
+      "{'t-shirt': 5, 'mug': 2, 'hat': 1, 'book': 10, 'pen': 6}\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e2626f31",
+   "metadata": {},
+   "source": [
+    "2. Modify the `calculate_total_price` function to include error handling.\n",
+    "   - If the user enters an invalid price (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the price for that product.\n",
+    "   - Use a try-except block to handle the error and continue prompting the user until a valid price is entered."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "e2338710",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders():\n",
+    "    num_orders = int(input(\"Enter the number of customer orders \"))\n",
+    "    customer_orders = [input(\"Enter a product to order: \") for product in range(num_orders)]\n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "7cef5460",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['mug', 'hat']\n"
+     ]
+    }
+   ],
+   "source": [
+    "orders = get_customer_orders()\n",
+    "print(orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7ddaa07e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prices = []  #siempre poner las listas, dict, etc, FUERA de la función"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f6247f42",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def total_price(orders):\n",
+    "\n",
+    "    \n",
+    "    for product in orders:\n",
+    "        valid_price = False\n",
+    "        \n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of the {product}: \"))\n",
+    "\n",
+    "                if price <= 0:\n",
+    "                    raise ValueError(\"The price cannot be negative or zero\")\n",
+    "\n",
+    "                valid_price = True\n",
+    "\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}. Please, enter a valid price\")\n",
+    "\n",
+    "        prices.append(price)\n",
+    "    \n",
+    "    return sum(prices)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 22,
+   "id": "b3707237",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "11.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "prices = total_price(orders)\n",
+    "print(prices)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "id": "a7b0a362",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Error: The price cannot be negative or zero. Please, enter a valid price\n",
+      "Error: The price cannot be negative or zero. Please, enter a valid price\n",
+      "Error: could not convert string to float: 'l'. Please, enter a valid price\n",
+      "Error: could not convert string to float: ' '. Please, enter a valid price\n",
+      "Error: could not convert string to float: ' '. Please, enter a valid price\n",
+      "Error: The price cannot be negative or zero. Please, enter a valid price\n",
+      "7.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "prices = total_price(orders)\n",
+    "print(prices)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "954de579",
+   "metadata": {},
+   "source": [
+    "3. Modify the `get_customer_orders` function to include error handling.\n",
+    "   - If the user enters an invalid number of orders (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the number of orders.\n",
+    "   - If the user enters an invalid product name (e.g., a product name that is not in the inventory), or that doesn't have stock available, display an error message and ask them to re-enter the product name. *Hint: you will need to pass inventory as a parameter*\n",
+    "   - Use a try-except block to handle the error and continue prompting the user until a valid product name is entered."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 43,
+   "id": "4ca0339c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "    customer_orders = []"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 44,
+   "id": "0f58964c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders():\n",
+    "    \n",
+    "    valid_number = True\n",
+    "    while valid_number:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"Enter the number of customer orders \"))\n",
+    "            if num_orders <= 0:\n",
+    "                raise ValueError(\"The number of customer orders cannot be negative or 0\")\n",
+    "            valid_number = False\n",
+    "        except ValueError as error:\n",
+    "            print(f\"Error: {error}. Please enter a valid number of customer orders\")\n",
+    "\n",
+    "\n",
+    "\n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = True\n",
+    "\n",
+    "        while valid_product:\n",
+    "            try: \n",
+    "                product = input(\"Enter a product to order:\")\n",
+    "                if product not in inventory: \n",
+    "                    raise ValueError(\"This product is not in the inventory\")\n",
+    "                if inventory[product]<= 0:\n",
+    "                    raise ValueError(\"This product doesn't have stock available\")\n",
+    "                valid_product = False \n",
+    "\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}. Please enter a valid product.\")\n",
+    "    \n",
+    "        customer_orders.append(product)\n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 45,
+   "id": "d97b76e2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['hat', 'book']\n"
+     ]
+    }
+   ],
+   "source": [
+    "orders = get_customer_orders()\n",
+    "print(orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 46,
+   "id": "11c86164",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['hat', 'book']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(customer_orders)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +384,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,