Season Pass

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 twenty dollars the first time."
He continued, "Anybody caught breaking this rule the second time will be fined sixty dollars. Being caught a third time will cost you a fine of one hundred eighty dollars. Are there any questions?"
A male student in the crowd inquired: "How much for a season pass?"