Table 15-8 the Following Table Provides Information on the Price, Quantity, and Quantity

Multiple Choice

Table 15-8
The following table provides information on the price, quantity, and average total cost for a monopoly.
-Refer to Table 15-8. How much extra revenue does the monopolist earn when he lowers the price from $18 to $12?

A) $10
B) $12
C) $30
D) $41