Consumers, Producers, and the Efficiency of Markets 1759
77. Suppose Brent, Callie, and Danielle each purchase a particular type of electric pencil sharpener at
a price of $20.
Brent’s willingness to pay was $22, Callie’s willingness to pay was $25, and Danielle’s willingness
to pay was $30.
Which of the following statements is correct?
a. Had the price of the pencil sharpener been $24 rather than $20, only Danielle would have been
a buyer.
b. Brent’s consumer surplus is the smallest of the three individual consumer surpluses.
c. For the three individuals together, consumer surplus amounts to $60.
d. The fact that all three individuals paid $20 for the same type of pencil sharpener indicates that
each one placed the same value on that pencil sharpener.
78. Suppose Katie, Kendra, and Kristen each purchase a particular type of cell phone at a price of
$80. Katie’s willingness to pay was $100, Kendra’s willingness to pay was $95, and Kristen‘s
willingness to pay was $80. Which of the following statements is correct?
a. For the three individuals together, consumer surplus amounts to $35.
b. Having bought the cell phone, Kristen is better off than she would have been had she not
bought it.
c. Had the price of the cell phone been $95 rather than $80, Katie and Kendra definitely would
have been buyers and Kristen definitely would not have been a buyer.
d. The fact that all three individuals paid $80 for the same type of cell phone indicates that each
one placed the same value on that cell phone.