[
  {
    "id": "A",
    "qty": "2",
    "source_file": "2026-07.csv"
  },
  {
    "id": "B",
    "qty": "3",
    "source_file": "2026-07.csv"
  },
  {
    "id": "C",
    "qty": "4",
    "source_file": "2026-08.csv"
  },
  {
    "id": "D",
    "qty": "5",
    "source_file": "2026-09.csv"
  }
]