I'm with Steve to the effect that a business remains in business to pay the bills and make money. I fully agree with this principle.
But a business should never forget customers (and their friends) will come back only if they feel they were treated fairly.
In this case, the business probably made a $60. profit on the bill but also probably lost a custumer for life. Who will benefit from this situation?.... A competitor with better understanding of all facets of business practices.
I remember being ripped-off years ago by a Honda dealer where I was charged $15.00 of labor to replace a burned tail light bulb on my car while I was checking for a new car in the showroom. Guess where I bought my new car....from a competitor.
.Jackd