First, use licenses.
Licensing can be a very complex and tortuous legal web with image use being highly restrictive as to when, how long, what geographical region use is restricted to (local or international), and even what media the images are used in (print, web, billboard, TV to name a few). This type of license are covered under a broad description of "Rights Managed". ProdPhoto.com uses the simplest licensing scheme of all, "Stock License". The essentials are that you as the client can use the images in any media, in any location, for as long as you want. No recurrent fees or charges.
Next, set-up fees.
Set-up fees vary from job to job but generally cover the cost of dressing the studio for your job. It can include consumables (wear and tear on equipment, mounting wax, strobe bulbs), special order props( pink background paper?) and special equipment rentals(lenses, strobes, mannequins) typically used only for one project.
Here are some Holiday decorations I just finished that didn't require much in special equipment but took considerable time in set-up. Everything had to be glued down and positioned exactly.
Group shot on a glass sheet.
Everything has been glued in place.