I wouldn't pay for crap like that. Then again I paid for some stupid 'materials' fee when I took my car in to get my brake lights fixed. They said the 'materials' was a generic fee that covered crap like fluids for their lifts and towels and crap. I just wanted to take my car and go home so I didn't bother arguing. That's probably what they're hoping for from most people. 'I don't like it but I'll pay it. Just give me my M3.'
Bah. Curse our impatient culture.