How Much for a Season Pass?

A new dorm rule was announced.

“The female dormitory will be out-of-bounds for all male students, so too 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 incur a hefty fine of $180. Are there any questions?"

"At this, a male student in the crowd inquires, “Er... How much for a season pass?"