On the first day of college, the Dean addressed the students, pointing out
some of the rules: "The female dormitory will be out-of-bounds for all
male students, and the male dormitory to the female students. Anybody
caught breaking this rule will be fined $20 the first time. Anybody caught
breaking this rule the second time will be fined $60. Being caught a third
time will cost you a fine of $180. Are there any questions?"

At this point, a male student in the crowd inquired: "How much for a
season pass?"