diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..989bc61
Binary files /dev/null and b/.DS_Store differ
diff --git a/lab-python-flow-control.ipynb b/lab-python-flow-control.ipynb
index f4c7391..08ca3b2 100644
--- a/lab-python-flow-control.ipynb
+++ b/lab-python-flow-control.ipynb
@@ -37,13 +37,140 @@
     "\n",
     "3. Instead of updating the inventory by subtracting 1 from the quantity of each product, only do it for  the products that were ordered (those in \"customer_orders\")."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "79c43b72-3720-4138-8d35-ea62836c49c9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "inventory = {\n",
+    "    \"t-shirt\": 10,\n",
+    "    \"mug\": 15,\n",
+    "    \"hat\": 8,\n",
+    "    \"book\": 5,\n",
+    "    \"keychain\": 20\n",
+    "}\n",
+    "\n",
+    "customer_orders = set()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "2be6001d-7c0e-4fb9-92a5-d0ba56ec0de6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Enter a product a customer wants to order:  hat\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "hat added to the order.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Add another product? (yes/no):  yes\n",
+      "Enter a product a customer wants to order:  mug\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "mug added to the order.\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Add another product? (yes/no):  no\n"
+     ]
+    }
+   ],
+   "source": [
+    "while True:\n",
+    "    product = input(\"Enter a product a customer wants to order: \").lower()\n",
+    "\n",
+    "    if product in products:\n",
+    "        customer_orders.add(product)\n",
+    "        print(product, \"added to the order.\")\n",
+    "    else:\n",
+    "        print(\"Product not available.\")\n",
+    "\n",
+    "    another = input(\"Add another product? (yes/no): \").lower()\n",
+    "\n",
+    "    if another == \"no\":\n",
+    "        break"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "949e68af-dcf6-40a5-925a-e1d38e01286b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for item in customer_orders:\n",
+    "    inventory[item] -= 1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "67f00737-13fc-4c9c-9aea-774e43fce5a5",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Customer orders: {'hat', 'mug'}\n",
+      "\n",
+      "Updated inventory:\n",
+      "t-shirt : 10\n",
+      "mug : 14\n",
+      "hat : 7\n",
+      "book : 5\n",
+      "keychain : 20\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Customer orders:\", customer_orders)\n",
+    "\n",
+    "print(\"\\nUpdated inventory:\")\n",
+    "for product, quantity in inventory.items():\n",
+    "    print(product, \":\", quantity)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "15cf667a-781f-49ba-8460-e84f2eb663fc",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python [conda env:base] *",
    "language": "python",
-   "name": "python3"
+   "name": "conda-base-py"
   },
   "language_info": {
    "codemirror_mode": {
@@ -55,7 +182,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,