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."
He continued, "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?"