example A1="" B1=2 C1=3 IN F1: =A1-(B1/10)-(C1/10)
answer should be -.01
Need to skip which ever cell of the three is blank and only do the next part of the calculation
So the A1- part is skipped in the calculation because A1 is blank (in the example). But any cell of the 3 could be blank.
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