Say I have this

1 2
A f1 f2
B ? ?

How do I leave B1 and B2 blank if their corresponding
f1 and f2 functions in A1 and A2 respectively are either
0 or blank. Again in psedo-code

A1=(if(blah), some_value, "")
B1=if(OR(ISBLANK(A1), A1=0), "", some_value)

Similar for A2/B2

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