Suppose that in Mexico, it takes four labor hours to produce one shirt and 12 labor hours to produce one computer. Suppose that in the United States, it takes four labor hours to produce one shirt and three labor hours to produce one computer. If both countries have 60 labor hours available, completely specialize according to comparative advantage, and trade 7.5 shirts for 7.5 computers, which of the following gives total consumption in the United States after trade? a. 15 shirts and 20 computers

b. 7.5 shirts and 10 computers

c. 7.5 shirts and 12.5 computers

d. 7.5 shirts and 7.5 computers