{
  "id": "discount-order-calculation-brief",
  "synthetic": true,
  "function": "discount",
  "scope": [
    "No tax, rounding engine, refund policy, app-specific discount implementation or inferred shipping threshold. Eligibility must be independently verified.",
    "不实现税费、平台舍入、退款政策或应用专属折扣；不推断运费门槛，叠加资格须另外核对。"
  ],
  "cases": [
    {
      "args": [
        20000,
        2000,
        10
      ],
      "expected": 16200
    },
    {
      "args": [
        10000,
        0,
        30
      ],
      "expected": 7000
    },
    {
      "args": [
        20000,
        0,
        0
      ],
      "expected": 20000
    }
  ]
}