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Tough: Vlookup, Match, Sumproduct? To create list of persistence
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SteveC
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Tough: Vlookup, Match, Sumproduct? To create list of persistence
One more thing: only need to look back 4 consecutive monthly periods...
so if you starting with May, you only need to look at May, April, March,
Feb...
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Tough: Vlookup, Match, Sumproduct? To create list of persistence