I need the sum of random cells in a row

Kitty ✭✭✭✭✭
edited 12/09/19 in Smartsheet Basics

Here is my formula, and S/S does not like it.


= [National Instructor 1 Numerator]@row + [National Instructor 2 Numerator]@row + [National Instructor 3 Numerator]@row + [National Instructor 4 Numerator]@row

Am I missing something?  I copied this from another community question and she wrote back that it worked, but it's not working for me.  Any help would be greatly appreciated!