Obi Wan Kenobi: You're My Only...HELP!!!!!!
=SUMPRODUCT((Sheet1!A2:A9=Sheet1!A2)*(Sheet1!B2:B9 =Sheet1!B4),Sheet1!
C2:C9)
Matching cell values in a lookup rather than specifying a static
value eliminates some comparison errors.
This formula will give you the desired result.
Nick
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