Products Page Vertical Spacing

I've seen this question asked but have not found a clear answer: How can I reduce the vertical space that each product takes on the products pages? I'm using the Modern theme and the standard shortcodes. I simply want more products to show before having to scroll.
http://onebodytouchworks.com/classes/register-classes/asheville-courses/

Please tell me the file to edit and file location. Thanks!

Loretta