Help! I can't seem to wrap my head around writing in if blank leave blank into the formula below. What I need is if B6 is blank leave C6 blank otherwise when I put a total in B6 I need the formula below to calculate. It is a rolling 12 month average. Your help would be greatly appreciated.
Formula currently in Cell C6
=SUM(D7:D$15,B$4:B6)/12
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