Good evening guys,
So this works if all the cells have data, but if blank, I get a #N/A error.
=SUMPRODUCT((H8:H11)*(L8:L11)*(G8:G11="SA450/60"))
As data will be added during the month the table starts off fairly sparse so I'd like my formula to skip/ignore if left blank.
Tried a few variants I've found online but no success.
Thanks in advance.
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