[fast&low]

Two things worried me about what you just said?
You go to a shop that's labor rate is 100 an hour
& also one that still turns rotors
Call around your area every shop has different labor rates in order to stay competitive.
The only thing that stays the same is they all use the same labor book that tells them what they can legally charge for a job
Depending on year and make of the car the book tells you how much time to charge for the job.
Whether it be a starter,alternator or breaks so if they tell you there charging you an hour and a half to do your alternator there not telling you that's how long it will take them there telling you how much that job charges & not you or they have any control over that
That is what the book calls for the only control you have is how much labor rate you are willing to pay.
So start calling around and ask for their labor rate before letting them work on your car