Perhaps something like:
=if(isblank(a1),b1+c1+d1,a1*e1)
where a has hours, b is unit, c is exp, d is tax, and e is hourly rate.

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Hope it helps!
Anne Troy
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"G4" wrote in message
...
How do i Ask for the same argument from either one of two columns (IE Hour
or
Unit + exp+tax )