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