{
  "version": 1, "currency": "JPY",
  "period": "2026-09-01/2026-09-30",
  "workload": "1000 support drafts",
  "quality": "Same acceptance rubric, human review required",
  "events": [{"event_id": "batch-001",
    "baseline": "100000", "proposed": "60000", "additional": "5000"}]
}

{
  "version": 1,
  "events": [{
    "event_id": "request-001",
    "currency": "JPY",
    "billed": "120",
    "cost": "80.250000",
    "cost_status": "final",
    "expected": "120"
  }]
}