{
  "currency": "USD",
  "minorUnitDigits": 2,
  "carts": [
    {
      "id": "lower-item-price",
      "items": [{ "id": "identical-item", "unitPrice": "18.00", "quantity": 1, "discount": "0.00" }],
      "orderDiscount": "0.00",
      "shipping": "5.99",
      "tax": "1.50",
      "fees": "0.00"
    },
    {
      "id": "free-shipping",
      "items": [{ "id": "identical-item", "unitPrice": "22.00", "quantity": 1, "discount": "0.00" }],
      "orderDiscount": "1.00",
      "shipping": "0.00",
      "tax": "1.50",
      "fees": "0.00"
    }
  ]
}