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Old 04-23-2016, 06:40 PM
jeffreybrown jeffreybrown is offline Windows Vista Office 2007
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Join Date: Apr 2016
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Change all of dates beginning in S3 to 1/1/2015, U3 to 2/1/2015, and so on

Now in S4

=SUMPRODUCT(--(MONTH($I$11:$I$40)&YEAR($I$11:$I$40)=TEXT(S3,"mmy yyy")),$J$11:$J$40)

copy to U4, W4 etc
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