WooCommerce MyStile theme customization

Not sure if this falls under the plugin or theme category because I am not sure where I need to begin editing. I would like to change the look of the product archive page that can be found here:
http://www.adventurecreek.com/store/
I want to modify where the price shows up for each product, show a “Buy Now” button, and just tweak the overall look a little. I am having no luck figuring this out, so please help!

Thanks.