{
  "currency": "USD",
  "waste_factor": 1.15,
  "electricity_cost_per_kwh": 0.12,
  "printer_average_watts": 120,
  "print_hours_per_box": 8.0,
  "target_box_counts": [1, 4, 12],
  "printed_materials": [
    {
      "id": "petg",
      "name": "PETG",
      "cost_per_kg": 22.00,
      "grams_per_box": 220
    },
    {
      "id": "asa",
      "name": "ASA",
      "cost_per_kg": 28.00,
      "grams_per_box": 90
    },
    {
      "id": "tpu",
      "name": "TPU",
      "cost_per_kg": 26.00,
      "grams_per_box": 20
    }
  ],
  "notes": [
    "Printed weights are initial estimates and should later be replaced with slicer-derived actuals.",
    "Waste factor is applied to printed material cost only.",
    "Electricity uses printer_average_watts multiplied by print_hours_per_box."
  ]
}