Provide subtotals on Matrix Reports

[#1]

Currently if you create a 2x2 matrix report you only get a single row total and column total for the lowest level of detail. It would be nice to have the totals display for the highest level as well (similar to pivot table in excel).

[#2]

Perhaps the totals could be configurable so they can be enabled and disabled by the report creator and also adjusted at run-time by the user. i.e. Allow them to switch on/off the sub-totals for 1st and 2nd level groupings, and also the grand total.

[#3]

David, I like your suggestion to make them configurable! I can't believe this on hasn't had more votes by now. :)