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Posted to microsoft.public.excel.worksheet.functions
Vito
 
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Default retrieve unique items with 2 criteria


You don't need an argument for the "O array", try:

=SUMPRODUCT((($O$7:$O$2710)*($M$7:$M$2710="1986"))/COUNTIF($O$7:$O$2710,$O$7:$O$2710&""))


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Vito
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