Vantage 8.03.xx: Dashboards Grid summary formats?

Has anyone tried to format a number in the summary linen of a dashboard grid? The field that I am doing a SUM on is a Decimal with >>>,>>>,>>9.99 format.

One of my GroupBy fields is a calcfield 'Year-Month'. So if the total for the month has no cents value, then no '0'(zeros) show up after the decimal point.

Is there any suggestions?