Product Suggestions
Currently when adding a report group you get a count of lines, it would be useful to have the option of field sum instead of line count.
This functionality already exists via the Grouping and Summary options for reports.
When configuring a group, you can drag fields into the bottom section to summarise data from that field, such as displaying the sum total, maximum/minimum value or the count of distinct values in the column.
i recall that i was trying to do this at the line level, not within the header - screenshot attached to help clarify