MSA Computer Corporation manufactures two models of minicomputers, the Alpha 4 and the Beta 5. The firm employs five technicians, working 170 hours each per month, on its assembly line. Management insists that full employment (i.e., all 170 hours of time) be maintained for each worker during next month's operations. It requires 22 labor hours to assemble each Alpha 4 computers and 28 labor hours to assemble each Beta 5 model. MSA wants to see at least 12 Alpha 4s and at least 18 Beta 5s produced during the production period. Alpha 4s generate $1,200 profit per unit, and Beta 5s yield $1,800 each. Determine the most profitable number of each model of minicomputer to produce during the coming month.