I am trying to do a report that is grouped on time.  A company wants to see the times of day that they are most busy.  And want it grouped to show sales every 15 minutes. 

 

I had a formula that loaded the time into variables, but didn't give me consistant data, as it didn't have "whileprintingrecords" because once I added that, the report would crash. *Can't group on those formulas". 

 

Any tips would be great..