Each location has its own availability and prices, but for a good start, visit the Maryland Region Chick-Fil-A site at http://www.mdcfa.com/cfaanywhere.html- they have menus from 40 different stores.
Chik-fil-a offers a great variety of their foods for catering. Visit http://www.chick-fil-a.com/#menu to view their menu online and you can even order online.