$ Values not carrying to cart

HI, I just installed this plug in (free version) have made the product, with its range of $ values on the Gift Card. The product looks great on the page and shows all the $ amounts in a drop down box, but when you add one of them to the cart, it shows as “Free”. The amount does not go through to the cart. I will disable the plug in until someone helps me figure it out.

https://www.colourcascadefabrics.com.au