Robert,Great – thanks! I did figure that out (eventually), but now have the issue of the Permit Fee field showing $0.26 when it should just show $0.00 until the Number field is filled in and the amount is calculated. Can you help? The error screen says that it doesn’t like the last equal sign. I’m at a loss…TopmostSubform.Page1.Cell[10].Permit_Fee::calculate - (FormCalc, client)Permit_Fee.rawValue = (4000.00Cell[8].Number + 0.25)1.0225If(Number.isNull | Permit_Fee = “”)Thanks!Noemi Harvell