SUM all cells to the right

[DaRTH KiRo]

I have a table which contains Transaction Total in column N, all columns to the right are different transaction types and their cells contain the monthly total. There is the possibility for additional columns for new transaction types to be added to the right of column N. Because of this, I am trying to figure out how I can set up column N to SUM all cells to the right. Is this something that is possible? I have been searching for awhile but I feel as if I may have been phrasing it wrong.

 

[CA_Punit]

You could select cell from "O" to "XFD" and use sum("O":"XFD")
In this case if there are columns of data being added up it will select all the cells to the right.