Running Total in Crosstab

[romulas80]

I have to build a crosstab report with site names as the rows, month-year as the columns, and dollar amount as the measure.

The customer wants three totals: a YTD total for each site, a monthly total for each month, and a cumulative total that increases with each subsequent month.

Everything I have tried either just does another standard total or changes all the values.

How do I add a running total row to the bottom of my crosstab?