Hello, Sorry if this is in the wrong place, I wasn't sure where else to put it. Please can someone help me. I am trying to make a formula dynamic, this is a very simple example of what I am trying to do: I am trying to append a number that is stored in a field to a function Cell B4 contains the number 5 My function: =SUM(F*,U*) Code (markup): Where the * are I want it to substitute it with a 5. So literally speaking: =SUM(F[B](B4)[/B],U[B](B4)[/B]) Code (markup): Any ideas? I would appreciate your help