If the Demand Function for a Certain Commodity Is $p ( x ) = 4 - \frac { x } { 30 }$

Multiple Choice

If the demand function for a certain commodity is $p ( x ) = 4 - \frac { x } { 30 }$ and the consumer surplus is 15, what should be the sale price?

A) 1
B) 4
C) 1.5
D) 2.5
E) 3.3
F) 6
G) 2
H) 3