A university is planning to hold an event at a local venue, which will charge a fixed rental fee of $615 for the event plus $16.40 per guest for food. The university has budgeted $860 for administrative and marketing expenses. It plans to hire a band, which will cost another $450. Tickets are expected to sell for $39.80 per guest. Ignore taxes. What is the degree of operating leverage if 247 guests attend?