24) Ace Airfreight, a company that delivers cargo by air, operates both single and twin engine airplanes and the cost to operate a single engine plane is $100 per hour and the cost to operate a twin is $300 per hour. Ace must schedule at least 30 flight hours per day in twin engine airplanes but due to a shortage of qualified pilots they are unable to schedule their twins for more than 100 flight hours per day. Ace has a constraint that require them to schedule their single engine planes for at least as many flight hours each day as they schedule their twins. Ace must honor obligations that require them to have their planes in the air for at least 140 hours each day. If Ace operates within these constraints, what will their minimum cost be for one day? A) $40000 B) $18000 C) $15000 $20000 E) $28000 None of above