I simplified and rounded them to the nearest whole US dollar. Though if there's a percentage, I won't round it after that. Just the base price (like the additional views at 45% or complicated poses at 25%).
Check out the link for my price chart, which also includes the link to my commission form and ToS.
http://goo.gl/W76Oz3
I also have a 1-3 more slots left for a quilted commission! I need to fill it up before I can print! http://pawgyle.tumblr.com/post/160659182507/some-examples-of-reference-sheets-i-have-made