I'd use INDEX instead:
=SUMPRODUCT(1/COUNTIF('Sheet1 '!B1:INDEX('Sheet1 '!B:B,A1),'Sheet1 '!B1:INDEX('Sheet1 '!B:B,A1)))
You could shorten with LET
I'd use INDEX instead:
=SUMPRODUCT(1/COUNTIF('Sheet1 '!B1:INDEX('Sheet1 '!B:B,A1),'Sheet1 '!B1:INDEX('Sheet1 '!B:B,A1)))
You could shorten with LET
Everyone who confuses correlation and causation ends up dead.
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