I feel like this might be a dumb question, however our catering has a service charge of 22% and a sales tax of 9.something%, for the service fee, is that considered their tip? or is it necessary to tip on top of that?
I am trying to calculate with tax and service how much my meals will be, I just didn't want to screw myself and be in an awkward situation with a vendor who is expecting an extra $400 or something and we haven't budgeted for it.