A university is planning to hold an event at a local venue, which will charge a fixed rental fee of $525 for the event plus $13.40 per guest for food.The university has budgeted $770 for administrative and marketing expenses.It plans to hire a band, which will cost another $360.Tickets are expected to sell for $36.80 per guest.Ignore taxes.How many tickets must be sold if the university plans to raise $4,410 in net cash flow from this event?