Assume that labour is the only factor of production and that wages in the United States equal $20 per hour while wages in Japan are $10 per hour. Production costs would be lower in Japan than in the United States if?Select one:

U.S. labour productivity equaled 40 units per hour and Japan's 15 units per hour.

U.S. labour productivity equaled 30 units per hour and Japan's 10 units per hour.

U.S. labour productivity equaled 40 units per hour and Japan's 20 units per hour.

U.S. labour productivity equaled 30 units per hour and Japan's 15 units per hour.

U.S. labour productivity equaled 30 units per hour and Japan's 20 units per hour.