Definitely cents, with the emphasize on the s. If you want to use it as an adjective, just always make it singular to render it as a modifier. And if you want it is a noun, you don't have to change the form of the word/s what you have intended to state. You can click the link here for more information. http://www.topix.com/forum/city/welch-wv/TSFBIHPPHBRQ8OLE3