The table above gives a firm's total product schedule. Suppose labor is the only variable factor of production. The price of labor is $500 per week and total fixed costs are $600 per week. What is the marginal cost of producing the 90th unit?

Discouraged workers:

a. would increase unemployment rate if they were added to the number of unemployed workers. b. are counted as one-half of a worker in the unemployment statistics. c. are counted as unemployed workers when the unemployment rate is calculated. d. are not included in the calculation of the unemployment rate, the labor force, or the working-age population e. would decrease the unemployment rate if they were added to the number of unemployed workers.

The actions taken by arbitrageurs in the foreign exchange markets

a. destabilize foreign exchange markets b. are highly risky c. have no effect on exchange rates d. help assure that exchange rates are equalized across all markets e. are the same as those undertaken by speculators