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My current formula ,'[PBDunkAcc.xlsx]Shell'!C3:C5,3,FALSE),VLOOKUP(C[-2],'[PBDunkAcc.xlsx]Shell'!C3:C5,3,FALSE)+1,1)"]
will always increase the prior day value by 1 if present. Except, the IFERROR option won't increase by 1, only change #N/A..
Do you know a way to build that...