{
  "scenario_name": "illustrative-base",
  "marketplace": "Amazon US",
  "currency": "USD",
  "selling_price": 29.99,
  "referral_fee_rate": 0.15,
  "fulfillment_fee": 4.25,
  "landed_product_cost": 7.8,
  "return_rate": 0.06,
  "return_loss_per_return": 8.0,
  "advertising_acos": 0.14,
  "other_variable_cost": 0.55,
  "order_units": 1000,
  "tooling_cost": 1800.0,
  "setup_cost": 450.0,
  "deposit_rate": 0.3,
  "working_capital_buffer": 2500.0,
  "scenarios": [
    {"name": "higher-returns", "overrides": {"return_rate": 0.14}},
    {"name": "higher-ad-spend", "overrides": {"advertising_acos": 0.25}}
  ]
}