I seem to remember using summary fields in calculations and only place the fields in a sub-summary part. In my example I would summarize food sales and food counts each with a summary field. In the sub-summary part I would use a calculation field that was
foodsales.sum/foodcnt.sum to get the food average per guest.
In my example today, I want to summarize the storage (GB) for various servers by customer. In the sub-summary part I have a field for that total storage(storage.sum). I would like to add a calculation field that is round ( storage.sum * backup_rate, 2).
Can't I do this?