The Production Function Is F (L, M)=5L^1/2M^1/2, Where L Is

Multiple Choice

The production function is f (L, M) =5L^1/2M^1/2, where L is the number of units of labor and M is the number of machines.If the amounts of both factors can be varied and if the cost of labor is $9 per unit and the cost of using machines is $64 per machine, then the total cost of producing 12 units of output is

A) $438.
B) $108.
C) $576.
D) $115.20.
E) $57.60.