I have this calculation which works fine if all cells have a value. But it will happen that cells in the range are empty.
=SUMPRODUCT(--(1*LEFT('Courses input'!C4:D6,1)-C3<=0), --(1*MID('Courses input'!C4:D6,3,1)>=2))/E3
What can i do to exclude empty cells in the range from calculation?
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