Woocommerce Add to Cart for Variable Products not working

I am going crazy! Working on a site using Thesis and Woocommerce. I have been trying for days to get the variable pricing to work, but it will not add to cart. I have tried different versions of Woocommerce, disabled all plugins, checked for .js errors on my console, but nothing seems to work. any help would be wonderful!

locomotivboards.com is the url. I can also provide you the login for cpanel and wordpress if necessary.

Thanks so much in advance!!