Can I please get some help with the formula for this?
1)The formula should check the total of all product SKU volumes over all time periods
2) check if the value is not equal to zero.
1) You need to use Timesum() function to sum Product SKU volumes over all time periods, Review timesum() function : https://help.anaplan.com/anapedia/Content/Calculation_Functions/All/TIMESUM.html
2) and the result you achieved using that function need to compare using a conditional operator to set boolean value true.
Review conditional operator: