{
  "trimPerEnd": 8,
  "kerf": 3,
  "stocks": [
    {
      "id": "stock-main",
      "length": 6000,
      "quantity": 20,
      "unitCost": 100,
      "label": "Standard 6000 mm aluminum profile"
    }
  ],
  "demands": [
    { "id": "A-01", "length": 1850, "quantity": 4, "label": "Window frame rail" },
    { "id": "A-02", "length": 1620, "quantity": 3, "label": "Window frame stile" },
    { "id": "B-06", "length": 1320, "quantity": 6, "label": "Mullion" },
    { "id": "C-03", "length": 620, "quantity": 4, "label": "Glazing bead" }
  ]
}