A local civic arena is negotiating a contract with a touring ice$-$skating show, Icey Blades. Icey Blades charges a flat fee of $60,000/$ per night plus $40$ percent of the gate receipts.The civic arena plans to charge one price for all seats, $12\mathrm{.}50$ per ticket$\mathrm{.}1.$ Determine the number of tickets which must be sold each night in order to break even$\mathrm{.}2.$ If the civic arena has a goal of clearing $15000/$ each night, how many tickets must be sold?$3.$ What would nightly profit equal if average attendance per night is $7,500$ per night?