{
  "tier_discounts": {
    "bronze": 0.00,
    "silver": 0.05,
    "gold": 0.10,
    "platinum": 0.15
  },
  "volume_discounts": [
    {"min_quantity": 50, "discount": 0.10},
    {"min_quantity": 10, "discount": 0.05}
  ],
  "notes": "Volume discounts are checked in order; first matching rule applies. Tier and volume discounts are additive."
}
