I think I would create a list for EACH combination (ABC, BDE) using logic or whatever, then just define them with the exact named range and you are done.
In the past I created the ONE data table (or lookup table) which has a column for each A, B, C, D, E, Days or whatever THEN you can just wrap a pivot on THAT and build a single column pivot on each combo. it might take 10 minutes to setup, but it is infinitely easier to manage than
which IS clever, assuming it works, but not as easy or quick to audit.
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