Remove 'Common Price' or 'Our Price'

Hi, i've been looking through the forums but cant find a solution, on my product pages i have two prices showing one called common price and the other is called our price. I only need one of these to show. Please can you let me know how to get rid of one of these please? thanks. Benjime.

If you don't put anything into the common price it won't show up? (correct me if i'm wrong though)