Can anyone tell me if an entire column can be used as criteria in a
SUMPRODUCT formula? I tried: =-SUMPRODUCT(--('PS Sales'!$K:$K='Jan
09'!I$1),--('PS Sales'!$F:$F='Jan 09'!$A18),'PS Sales'!$H:$H) but got a #NUM!
error.

Using =-SUMPRODUCT(--('PS Sales'!$K$1:$K$60000='Jan 09'!I$1),--('PS
Sales'!$F$1:$F$60000='Jan 09'!$A18),'PS Sales'!$H$1:$H$60000) works fine, but
typing the row numbers every time is a huge waste of time!

Thanks!
--
GD