The licorice industry is competitive. The price of licorice is $0.25, and 20 million units are sold per month. For a typical licorice producer, the average fixed cost is $0.20 and the average variable cost is $0.10. What should be the marginal cost of licorice?

(1) $0.10 (2) $0.20 (3) $0.25 (4) $0.30