what do you mean by subtotals?
1. do you mean totals for each column or
2. do you mean subtotals by row or
3. do you mean a subtotal column e.g. M1, M2, M3, Q1, M4, M5, M6, Q2 etc
if 1 you'll need to use vba to change the controlsource for the calculation control on the form
If 2 you'll need two crosstabs, one for the 'detail' rows and one for the subtotals which you'll either need to populate a temporary table or use a union query. You'll also need to include a column, if you haven't already got one so you can sort so it appears in the right order
if 3, you'll need to modify your crosstab to incorporate the different calculations for each type of column