I need to calculate summary weighted averages - for example the weighted average interest rate for a number of loans that are records in a loan table. The summary bar is very limited and you cannot create any calculated fields there that I can see.
e.g. Loan Amt Rate
$100 5%
$150 3%
$600 9%
The weighted average interest rate is:
( (100*.05) + (150*.03) + (600*.09) ) / (100 + 150 + 600) = .07 = 7%
Any ideas as to how i can do this?