HI Kevin Thanks, appreciate you trying to find a solution to this I still get the error above with that Formula for main and summary for Time. However I think the solution you mentioned would end up aggregating the ARPU metrics into Time period parents....so Jan $50, Feb $50, March $50 Q1 = $150 ARPU which is not correct in the sense of a quarterly ARPU Perhaps I am doing something silly but our Anaplan solutions architect was also stumped on this. Thanks Andrew
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