Cart url is http://www.fotopoet.org/zencart/

Have prints that come in two sizes. Set it up so as to have buyer choose from the two different sizes via a drop down. However the drop down lists its as follows:
8 x 10
11 x 14 (+18.50)

At the top of the page it lists the product price as starting at 19.95. Is there a way so as to get the drop down to actually list the price for the respective size print since it can cause confusion to the buyer.

Any ideas are welcomed. Thanks.