A warehouse club has customers with identical demand curves: Q = 100 – 5P, where Q is the annual number of merchandise units and P is the price per merchandise unit. The marginal cost of a merchandise unit is $10. If the warehouse club uses a two-part tariff strategy, it will earn producer surplus of per customer.

On coral island in 2012, the labor force is 12,000, the unemployment rate is 10 percent, and the labor force participation rate is 60 percent. during 2013, 200 unemployed people found jobs and the working-age population increased by 1,000. the total number of people in the labor force did not change. the working-age population at the end of 2013 was the unemployment rate at the end of 2013 was round up to the second decimal. the labor force participation rate at the end of 2013 was round up to the second decimal.