Add to cart in Abundance Theme/woocommerce

Hey guys I am almost done building a wordpress site using the abundance theme and woocommerce, but I am having an issue. I need a drop down menu for the product to select different option such as color, size, and other options. I have got the drop down menu to work, but the add to cart button is gone. I used this tutorial to do it.

Here is a link to my site and what I am talking about. There is no longer a add to cart button. It is either a problem with the theme or woo commerce: http://www.texaslakesandponds.com/shop/aeration/3-legged-galvanized-windmill/

Thanks for your help guys. This is one of the last things until I am done with this site.