Sum Functions - cell prompting

  • Thread starter Thread starter Jason S
  • Start date Start date
J

Jason S

I have a simple sum formula of 2 cells I have but I want
to make sure that the person puts a number in both cells.
I.E. the formula won't work and will notify the person
they must enter in values for both cells. So I guess I
need a "calculate" button and it looks at both cells.

HELP!!!
 
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