VS reporting subtotal problem

[smithsf22]

Hello, first time trying to make a report and it seem ok so far except that I have several lines of data and have created 3 groups of data. I can easily total all of the data but I want to total each group individually. I know it seems easy but I am having a hell of time getting this to work. Any help at all is very welcome. I am using VS 2005 reporting with SQL to get my data.

Thanks in advance