FLU, auto labor charges are by the book. They are standardized charges based on the make and year of the vehicle. They don’t charge for actual time even if it’s more or less than the actual time they spend on your car.
If a lawyer can charge $300/hr and an IT consultant can charge $200 plus expenses, then it’s reasonable to me that an auto mechanic charges $85/hr. $400 for a brake job is not expensive if it includes the pads.