The dean of students of a university is planning to charge students $150 to attend a summer freshmen's seminar course. It cost $3000 to reserve a room, hire an instructor, and bring in the necessary presentation equipment. Assume it costs $25 per student for the dean to provide the course materials. How many students would have to register for the seminar for the university to break-event? a. 16. b. 18. c. 20. d. 24. e. 30