Jay's technology finds that the total revenue function associated with producing a new type of computer chip is R(x)=730-0.3x^2, and the total cost function is C(x)=5x+13,where x represents the number of computer chips produced.
a) Find the total profit function, P(x)=R(x)-C(x). Simplify your answer.
b) What is the profit if 30 computer chips are produced?