I'm writing an Excel app that inserts columns as required and then sums them. At the moment I've got a template with the first column as the sum and then the second column as the iterating column - I copy it and paste one column to the right as required. I've got a SUM(Col2:Colx) in Column1 but every time I do the copy/paste, Excel increments the SUM - so if I insert a second column the sum changes to SUM(Col3:Colx+1). Is there any way I can stop this happening? I know I could write code to update the formula in the total column but I'd prefer to do something a bit more generic!