On the first day of college, the Dean addressed the students, pointing out some of the rules.
He said, "The female dormitory will be out-of-bounds for all male students, and the male dormitory to the female students. Anyone caught breaking this rule once will be fined $50."
He continued, "Anyone caught breaking this rule a second time will be fined $150. Being caught a third time will incur a hefty fine of $400. Are there questions?"
At this point, a male student in the crowd inquired, "How much for a season pass?"