To add to what others have said, the cost has three main components; overhead, skill of the beautician, and product. I did not do hair in the salon but nails. There was basic overhead I had to factor into a set of nails, the cost of the tips, brush, product, nippers and such that allowed me to be able to do my work. Then there was my training and skill, because of which even with rather crappy product I knew how to compensate. However, I used quality product, in many cases, you could not buy it at the drug store, or if you were to go to a beauty sup[ply store, it was the product you had to present your license to buy. Many of the …..(let’s say non-US native) salons, used the illegal junk that had MMA in it because ot was way cheaper to buy, and because they used electric files to carve the shape into the nail as oppose to forming it when they applied them, they could charge far less. They just wanted to make the sale, and of you came back, fine, if you did not, they could replace you with another looking for a bargain. I was able to observe those who did hair and those who were better skilled got more customers and those who repeated. They too used superior colors because they covered Grey better and looked more natural, but also they retained in the hair and did not wash out in the shower. I would say it cost more because 60% skill of the stylist, 25% product, 15% overhead (booth rental, expenses, taxes, etc.).