Product Prices only showing on sale items

Hi,

We are having an issue with the price of our product not showing up any more. This only seems to be happening to products that are not on sale. So any item that is on sale, the price is showing while any item not on sale has no price showing. Here is a link to an example on our website http://www.partyworld.ie/3/Kids-Costumes/Boys-Fancy-Dress/

Regards,
David