If cell is left blank, or equals zero, then cell equals a different cell
I'm working on a relatively easy spreadsheet and just can't figure
this one out.
I'd like the average of the column (which I already have a cell for)
to represent any cell in which the user doesn't enter a number, or
enters zero.
Also, I'd like this cell to be differentiated (highlighted, different
color font, etc.) so as to know when this condition is used.
Many thanks,
John
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