The Demand Function for a Commodity Is Given By $$p = 2,000 - 0.1 x - 0.01 x ^ { 2 } .$$

Multiple Choice

The demand function for a commodity is given by
$$p = 2,000 - 0.1 x - 0.01 x ^ { 2 } .$$
Find the consumer surplus when the sales level is 100 .

A) $\$ 9,167$
B) $\$ 7,167$
C) $\$ 11,167$
D) $\$ 8,167$
E) $\$ 10,167$