Only a slight ammendment
=SUMPRODUCT(($A$2:$A$100="Main")*($B$2:$B$100="Yes "))

I have enclosed the yes in " but it displays with a space above, it
should not be there! just "yes"

The conditions return a list of true and false, if they are multiplied
together you get
true x true =1
true x false =0
false x true =0
false x false=0

So it only sums the values when its true

The original formula tries to sum text and is not happy hence #num

Regards

Dav


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