I've always just split out those accounts as sub sections of a summary - and then done the calculations on the sub sections

Hmm so lets say like an expense account you want to do ratios on.. just split that one account into a sub section?

Right. So you have a summary for the section it falls under - and then the rest of the accounts get pulled into financial section 1. Then you have financial section 2 that includes the desired account. That way the overall financial report is correct - and then I can do ratios based on section 2 at the bottom.

ok gotcha

Less work than figuring out the statistical journal necessary as well.