I have below fields returning data from UNX
[Report Year] = [2013,2014,2015,2016]
[Report Month] = [1,2,3,4,5,6,7,8,9,10,11,12]
[Profit for Each Month] = [$123,456,234,786,....]
I want to calculate below 2 fields
[3year Cumulative Profit for each Month] = ??
[Annual Cumulative Profit for each Month] = ??