I have an appliance repair business. I charge for labor and parts. I mark up my parts a flat percentage. How do I respond when a customer wants me to breakdown the cost of labor vs parts? Because I know what they are really trying to do is see if they can find the part cheaper on the internet.
I don’t sell prices. I am here to work on the thing with 40 years of hard gained knowledge, skills, and experience.
There will always be a cheaper price. If price is the only thing that customer cares about, then so be it. You can refuse the work.