To find Number of days between fiscalperoid interval.

Hi

I have used a customer exit variable on Fiscalperiod to find fiscal period range (from-to) using fiscalyear and calmonth2 from variable screen(reqd. for report in Query designer).I have to find total number of days between fiscalperiod interval using the customer exit variable i have created on fiscalperiod.This variable is NOT READY FOR INPUT on the variable screen.

Kindly suggest me a solution.I would appreciate your help.

Thanks