Prices Shown by Widget Different from Prices on CafePress

Thank you so much for making this plugin. I am using it to display yoga mats I’ve created here: http://www.best-yoga-gifts.com/yoga-mats/. It seems to be working nicely, but unfortunately if you click on any of the yoga mats, you will see that the prices show on my website are lower than the prices the user sees when they click through to Cafepress. Is there a way to fix this? And if there is no quick fix, can you tell me how I could edit the code to remove the prices? Many thanks for your help!

http://wordpress.org/extend/plugins/cafepress-widget/