I sell a repair complete. If the customer questions the parts or labor prices I will break it down for them. Then I explain the warranty and such. If they continue to complain then they are not my type of customer! We all have to make a profit. Most will understand, If the customer don't understand that, then send them packing, Many will return after they have shopped around realizing the VALUE I offer. My customers respect me and want me to be here next week, month, year. If I am not profitable that aint happening. Good luck.