A university is planning to hold an event at a local venue, which will charge a fixed rental fee of $600 for the event plus $15.90 per guest for food. The university has budgeted $845 for administrative and marketing expenses. It plans to hire a band, which will cost another $435. Tickets are expected to sell for $39.30 per guest. Ignore taxes. What is the cash break-even point as measured in the number of tickets sold? 81 83 85 87 89