Matrix order of totals

I have a matrix that shows sums by month. The dataset returns both month and quarter. I want to have subtotals by Quarter. I have this working and the matrix returns columns as follows:
Jan Feb March Q1 April May June Q2 ... Total

What I would like to have is
Jan Feb March April May ... Q1 Q2 Q3 Q4 Total

Is there anyway to have subtotals displayed at the end of the row?

For dynamic groups (e.g. quarter), the subtotals are always part of that group. They currently cannot be moved out of that group instance.

Another way of doing this, is to use a table in the report with explicit columns for Jan, Feb, ..., Dec, Q1, ..., Q4, Total. You would then need to use expressions to calculate your month/quarter/year aggregations.

-- Robert