At my dealership the brake job labor costs the same with either replacement or machining. The labor rate is discounted so it remains competitive with jiffy lube type places. Ford rotors tend to cost about $60-90 a piece for most vehicles. They cost more on the F150 and upDepending on the car, rotors are so inexpensive now that you can buy a couple for what you are charging to do one.
What cars are you working on that still have rotors thick enough to turn? I gave up on turning drums and rotors nearly 20 years ago. Both were so thin from the factory there wasn’t enough to turn if they had more than a deep scratch
The machines now sit in a friends auto museum.
Depending on the car, rotors are so inexpensive now that you can buy a couple for what you are charging to do one.
Holy brake fluid Batman!