Price display Base price and final price

[Sorcha]

Hi 

I am new to prestashop and am having some teething problems. I have a template, which I purchased from template monster!

 

I want to display my products with a pre-sale and sale price. With the pre-sale price crossed out and the sale price the main price being displayed. My back office has all my products priced with a base price and a final price. I imported these from zen cart using cart 2 cart. Some of my products are showing up with a crossed out price but it is the same price for both (on the featured products on main page module). My template demo shows this working, at least of the featured products page.

 

Does anybody have an ideas on this. 

 

Have a look at my main page to see what I am talking about (featured products on main page)

http://tomsheehy.com/Prestashop

 

Thanks for any help

Sorcha