I have a column that if I add number to it B4, it must then show data in C4, but if it is blank it must show blank in c$ (that part I did get to work, but now if I have a number in E4 it must then not show anything in C4, so it must not do B3-B4.
I am not sure if I am on the correct track, did try this formula, but not working
=IF(ISBLANK(B4)*(NOT(ISBLANK(E4)),,B3-B4))
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