There is only one gas station within hundreds of miles. The owner finds that when she charges $3 a gallon, she sells 199 gallons a day, and when she charges $2.99 a gallon, she sells 200 gallons a day. The marginal revenue of the 200th gallon of gas is:

When the demand for products competing with imports falls, demand for the specific factors used in their production falls and:

a. the relative prices (earnings) of these specific factors will fall disproportionally. b. the relative prices (earnings) of these specific factors will rise disproportionally. c. the relative prices (earnings) of these specific factors will fall by the same rate as for all resources. d. the employment of these specific factors will rise disproportionally.

Which of the following best describes the effect on the aggregate supply curve if political negotiations result in a substantial decrease in the price of oil?

A) There is no change to the AS curve. B) The AS curve does not shift but there is a downward movement along it. C) The AS curve shifts leftward. D) The AS curve does not shift but there is an upward movement along it. E) The AS curve shifts rightward.