23. A pure monopolist is selling six units at a price of $12. If the marginal revenue of the seventh unit is $5, then the:

23. A pure monopolist is selling six units at a price of $12. If the marginal revenue of the seventh unit is $5, then the:
a. price of the seventh unit is $10.
b. price of the seventh unit is $11.
c. price of the seventh unit is greater than $12.
d. firm’s demand curve is perfectly elastic.

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