Try this formula
=IF(SUMPRODUCT(--(Sheet1!$A$1:$A$20=$B3),--(Sheet1!$C$1:$C$20=C$2))=0,"M","")
Try this formula
=IF(SUMPRODUCT(--(Sheet1!$A$1:$A$20=$B3),--(Sheet1!$C$1:$C$20=C$2))=0,"M","")
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Nihil simul inventum est et perfectum
Abusus non tollit usum
Last night I dreamed of a small consolation enjoyed only by the blind: Nobody knows the trouble I've not seen!
James Thurber
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