An Ice Cream Supplier Has Two Machines That Produce Vanilla

Multiple Choice

An ice cream supplier has two machines that produce vanilla and chocolate ice cream. To meet one of its contractual obligations, the company must produce at least 9 gallons of vanilla ice cream and 15 gallons of chocolate ice cream per day. One machine makes 6 gallons of vanilla and 3 gallons of chocolate ice cream per hour. The second machine makes 1 gallons of vanilla and 4 gallons of chocolate ice cream per hour. It costs $28 per hour to run machine 1 and $22 per hour to run machine 2. How many hours should each machine be operated to fulfill the contract at the least expense?

A) Machine 1 for 9 hours and machine 2 for no hours.
B) Machine 1 for 3 hours and machine 2 for 1 hour.
C) Machine 1 for 1 hour and machine 2 for 3 hours.
D) Machine 1 for no hours and machine 2 for 1 hour.
E) Machine 1 for no hours and machine 2 for 3 hours.