The financial department of a company that produces digital cameras arrived at the following cost function, the price demand function and the corresponding revenue function:
C(x)=15x+150; P(x)=60-3x; R(x)=xp(x)=x(60-3x); where 1<= x <=20
a) Find the number of units that must be produced and sold in order to break even. Find the marginal profit.
b) Find the value of x that maximizes the revenue.