A university is planning to hold an event at a local venue, which will charge a fixed rental fee of $585 for the event plus $15.40 per guest for food. The university has budgeted $830 for administrative and marketing expenses. It plans to hire a band, which will cost another $420. Tickets are expected to sell for $38.80 per guest. Ignore taxes. What is the degree of operating leverage if 243 guests attend? options: 1.48 1.51 1.55 1.59 1.62