Timesheet sum

Timesheet sum

Is there a way to see a sum of hours by group level in the timesheet? If I group a timesheet report by Project for one staff person, I would like to see the sum of hours for each project (or other group level) and not just the individual timelogs for that staff.

I know it's possible to view this information in the Project Details report, but only by one project task at a time. It would be extremely helpful to have a report that sums the timelogs for each group level so that it appears all in one report.