SEC(n).summaryId – reference section n's summary valueSUM(colId) · AVG(colId) ·
MIN(colId) · MAX(colId) · COUNT()SEC(n).summaryId — another section's summary valueSUM(kgco2e) / SUM(area) or SEC(1).total * 0.61
SEC(n).summaryId – section n's summary | ROW.colId – current row's column