this is my question,

The cost of producing q items is C(q) = 3000 + 30c] dollars. (a) What is the marginal cost of producing the 100th item? the 1000th item? The marginal cost to produce the 100th unit is $ n The marginal cost to produce the 1000th unit is $ n (b) What is the average cost of producing 100 items? 1000 items? The average cost of producing 100 units is $ n per unit. The average cost of producing 1000 units is $ n per unit