{
  "months": {
    "2026-04": {
      "completed_orders": 11,
      "line_value_eur": 600.0,
      "average_order_eur": 54.54545454545455,
      "coverage": "available"
    },
    "2026-05": {
      "completed_orders": 10,
      "line_value_eur": 590.0,
      "average_order_eur": 59.0,
      "coverage": "available"
    },
    "2026-06": {
      "completed_orders": 0,
      "line_value_eur": null,
      "average_order_eur": null,
      "coverage": "no source coverage"
    }
  },
  "grand_average_eur": 56.666666666666664,
  "arithmetic_mean_of_monthly_aov": 56.77272727272727,
  "warning": "Grand AOV must use grand value/grand orders, not mean of monthly averages."
}