The cost (in dollars) to manufacture smartphones is

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

The cost (in dollars) to manufacture

x

smartphones is

C(x) = 0.002x^{2} + 5x + 200

. Determine the marginal cost when

500\,\text{smartphones}

have been produced. Provide units with your answer.