Conditional formatting help Excel 2010

I would like to set conditional formatting where if value in one column is greater than another column.

I have included a sample table from what I'm working on. In this example table, I'd like conditional formatting to fill column C cell red if it is greater than column A.

I know how to do this for a single cell, but can't figure out how to set the whole column. I have over 7,000 cells in the column and definitely don't won't to do them 1 at a time or eyeball.

Appreciate your help,

Brian

Example_BRI.xlsx

Thanks K, now next question is where is format painter?

Sorry TM, I didn't realize that would make a difference my columns do have headings. Price 1 and Price 2

Thanks for the help