Try the following...
=SUMPRODUCT(--(A1:A100>="2/1/2005"+0),--(A1:A100<="2/28/2005"+0),B1:B100)
OR
=SUMPRODUCT(--(A1:A100>=C1),--(A1:A100<=D1),B1:B100)
...where C1 contains the start date, and D1 contains the end date.
Hope this helps!
Originally Posted by burgeon
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