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Posted to microsoft.public.excel.worksheet.functions
Jarek Kujawa[_2_] Jarek Kujawa[_2_] is offline
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Default Really need help with formula(Excel Office 2003)

one way:

=SUM(IF(($A$1=$C$1:$C$4)*($A$1<=$D$1:$D$4),$E$1:$ E$4,))

this is an array-formula so insert it with CTRL+SHIFT+ENTER