What is roll-up?
From our documentation: “When checked, a report with rollup will also display a sum total of aggregated sums as the last line of the report – for instance, in a count of people signing a petition month by month, the last line of a “rollup” report will show the total number of all people who have taken that action.” My coworker Jason also really likes to use this for donation reports, so I’ll have to check this out more in the future.