Suppose the domestic supply (Q S ) and demand (Q D )for MP3 players in the United States are given by the following set of equations: Q S = –25 + 10P Q D = 875 – 5P If the U.S. engages in free trade and the international price of MP3 players is $ 5 0 , it would import _____ MP3 players from the rest of the world. a. 1 50 b. 2 50 c. 4 75 d. 2 25