[
  {
    "product_id": "P01",
    "product_name": "Notebook kit",
    "category": "Materials",
    "unit_price_cents": 1000
  },
  {
    "product_id": "P02",
    "product_name": "Workshop seat",
    "category": "Learning",
    "unit_price_cents": 2000
  },
  {
    "product_id": "P03",
    "product_name": "Reference card",
    "category": "Materials",
    "unit_price_cents": 500
  }
]