diff --git a/lab-python-data-structures.ipynb b/lab-python-data-structures.ipynb
index 5b3ce9e0..b8c0bbc8 100644
--- a/lab-python-data-structures.ipynb
+++ b/lab-python-data-structures.ipynb
@@ -9,6 +9,165 @@
     "# Lab | Data Structures "
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = {}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "quantity available of each product:\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"quantity available of each product:\")\n",
+    "for item in products:\n",
+    "    while True:\n",
+    "        try:\n",
+    "            quantity = int(input(f\"Enter quantity for {item}: \"))\n",
+    "            if quantity < 0:\n",
+    "                print(\"Please enter a non-negative integer.\")\n",
+    "                continue\n",
+    "            inventory[item] = quantity\n",
+    "            break\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter an integer.\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "customer_order = set()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "three products I want to order: t-shirt, mug, hat, book, keychain\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"three products I want to order: t-shirt, mug, hat, book, keychain\")\n",
+    "for _ in range(3):\n",
+    "    while True:\n",
+    "        product = input(\"t-shirt, mug, hat, book, keychain: \")\n",
+    "        if product in products:\n",
+    "            customer_order.add(product)\n",
+    "            break\n",
+    "        else:\n",
+    "            print(\"Product not available. Please choose from the available products.\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "customer's order summary:\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"customer's order summary:\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "total_items = len(customer_order)\n",
+    "percentages = {3/5}\n",
+    "customer_order = (total_items, percentages)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "set()\n",
+      "0\n",
+      "{0.6}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(customer_order)\n",
+    "print(total_items)\n",
+    "print(percentages)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for item in customer_order:\n",
+    "    if inventory.get(item, 0) > 0:\n",
+    "        inventory[intem] -=1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "update_display:\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"update_display:\")\n",
+    "for item, quantity in inventory.items():\n",
+    "    print(f\"{item}: {quantity} left in stock\")"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -54,7 +213,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -68,7 +227,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,