David, it's hard to determine what you want exactly.
The point I would make on these types of calculations is that's it's often easier to revert to a SUMPRODUCT approach - "cleaner" so to speak:
would give you the quarterly commission values I believe ?![]()
G21: =SUMPRODUCT((SUM($G13:G13)>{0,250000,500000})+0,SUM($G13:G13)-{0,250000,500000},{0.05,0.05,0.05})-SUM($F21:F21) copied across
(using the cumulative "eligible fees" value as basis for calculation)
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