So I'm an I.T. guy that's new to Excel. I know just enough about it to get myself in trouble. I have a simple Excel spread sheet that I have but together, basically long story short, I need to be able to do this: I want to take one column and take the sum of a cell below another cell and display the difference in that cell, if that makes sense. I need to carry that formula all the way down the work sheet, very simple formula, just didn't know how to say "continue this all the way down this column."