If the Total Cost Function for a Product Is $C ( x ) = 500 + 3 x + 0.08 x ^ { 2 }$

Multiple Choice

If the total cost function for a product is $C ( x ) = 500 + 3 x + 0.08 x ^ { 2 }$ dollars, determine how many units x should be produced to minimize the average cost per unit?

A) 18 units
B) 500 units
C) 55 units
D) 79 units
E) 88 units