Button size

I’m new to WordPress, so perhaps there’s something obvious I’m missing. I’m loving the ease of use of this plugin, but having difficulty figuring out how to integrate it into my website. Specifically, the actual size of the “ADD TO CART” button and price text are perfect, but there’s a huge amount of white space around them, so big that it takes up maybe 1/3 of the page height per product. Is there a way to get rid of all that white space? To bring that “ADD TO CART” button into a paragraph of text, even? Any help would be much appreciated. Thank you!

best wishes, Scott

http://ww.wp.xz.cn/plugins/simple-e-commerce-shopping-cart/