Suppose That Demand for and Supply of a Commodity in a Market

Suppose that demand for and supply of a commodity in a market are shown on a graph with price on the vertical axis and quantity on the horizontal axis. The y-intercept of the demand curve is equal to $30. The equilibrium price and quantity are $20 and 300 units respectively. What is the total consumer surplus in the market?

A) $2,000
B) $1,300
C) $9,000
D) $3,000
E) $1,500