Referencing the attached image, how would one go about calculating the %Yield such that it is based on the cumulative values for columns A and B, where %Yield = (Cumulative Sum of B)/(Cumulative Sum of A)? Note that the %Yield values shown in the image are incorrect, except for the first Week.
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This is another of those "multiple aggregation" problems that come up on the forum from time to time, isn't it?
Only way I can think of is by doing the cumulative sums in custom SQL rather than using table calculations.