Hack up an anonymized workbook.
No way someone can sort through that and make heads-or-tails without seeking a concrete example. (Well, at least, I can't.)
Check out the brief video here:
All it would take is to get a handful of rows that calc out correctly, and a couple of examples that do not. And you'd only need the data from the fields being used in the calc. All the other fields won't matter.
And it looks like you are blending multiple data sources. Just make two excel sheets to simulate that.