Step by step please

The cost function C(x) = 15,000 + 90x + 1,000 X gives the cost in dollars to produce x units of a commodity. a. Find the marginal cost when the production level is x = 100 units. When they produce 100 units, the marginal costs is --Select Units---- In other words, the approximate cost to produce the 101st unit is dollars . b. Find the average cost per unit when they produce 100 units. When they produce 100 units, the average cost per unit is dollars. c. Fill in the blanks: Since the marginal cost is -Select Units- -- | the average cost per unit, increasing production from 100 units will cause the average cost per unit to Select Units