In the long run,
a. at least one of the firm's inputs is fixed
b. customer tastes and preferences are fixed
c. the firm may vary all inputs
d. sunk costs become variable costs
e. government intervention is inevitable
C
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Which of the following is a better measure of the productivity of employed people in a country?
A) Gross Domestic Product B) Gross National Product C) Income per worker D) Income per capita
For an economy starting at potential output, an increase in autonomous expenditure in the short run results in a(n):
A. decrease in potential output. B. expansionary output gap. C. increase in potential output. D. recessionary output gap.
When high school graduation and college graduation rates increased during the 1960s through the 1980s, this had its greatest impact on growth through which source?
A. An increase in economic freedom B. An increase in the number of workers C. An increase in the productivity of workers D. None of these
Refer to the information provided in Figure 15.3 below to answer the question(s) that follow. 
Figure 15.3 Refer to Figure 15.3. Gwen's Country Curtains is currently manufacturing and selling 1,000 pairs of curtains per month. The ________ for this company is $80,000.
A. total revenue B. fixed cost C. profit D. total cost