Refer to the above table. The current account balance is

When the rate of cyclical unemployment is zero, the

a. natural rate of unemployment must also be zero b. rate of frictional unemployment must be negative c. economy must have entered a recessionary stage d. Keynesian aggregate supply curve must be horizontal e. economy is considered to be at full employment

Total cost is the

a. amount a firm receives for the sale of its output. b. fixed cost less variable cost. c. market value of the inputs a firm uses in production. d. quantity of output minus the quantity of inputs used to make a good.