Aggregates a quantity takeoff (QTO) from a Revit or Excel schedule export — grouping by category/family/type and summing count, area, volume, length, and weight columns, stripping units and thousands separators. Use when producing a takeoff, a BoQ starting point, or quantity totals by group from a schedule CSV. Triggers on "quantity takeoff", "QTO", "bill of quantities", "sum by category", "bóc tách khối lượng", "tổng khối lượng theo nhóm".
