Solve the Problem $$p = - \frac { 1 } { 6 } x + 200 , \quad 0 \leq x \leq 1,200$$

Multiple Choice

Solve the problem.
-The price p and the quantity x sold of a certain product obey the demand equation $$p = - \frac { 1 } { 6 } x + 200 , \quad 0 \leq x \leq 1,200$$ What quantity x maximizes revenue? What is the maximum revenue?

A) 600; $60,000
B) 900; $45,000
C) 300; $45,000
D) 1,200; $60,000