Suppose that in a year an American worker can produce 60 shirts or 30 computers and a Chinese worker can produce 60 shirts or 12 computers. There are 1 million workers in each country.

Use the blue line (circle symbol) to graph the production possibilities frontier (PPF) for the United States, and use the green line (triangle symbol) to graph the production possibilities frontier for China.

Quantity of Computers (Millions) 30 27 24 21 18 15 12 10 20 30 40 50 60 70 Quantity of Shirts (Millions) 80 90 100 U.S. PPF + China PPF .1. U.S. without Trade at China without Trade