subrepot calculations to Main report

[lthomas6]

I am using Crystal 10 SQL backend.

I have 2 subreports in my report.
first subrport has a summarized field called reserve_total
Second subreport has a summarized field called cost_total

I want the main report to display the subtraction of
reserve_total - cost_total.

how can I achieve this?

 

[lthomas6]

I think I figured this out from reading another post.