Katherine has become concerned that sales may fall, as the team is on a terrible losing streak, and attendance has fallen off.

1-18. Katherine has become concerned that sales may fall, as the team is on a terrible losing streak, and attendance has fallen off. In fact, Katherine believes that she will sell only 500 programs for the next game. If it was possible to raise the selling price of the program and still sell 500, what would the price have to be for Katherine to break even by selling 500 ?