The total cost and the total revenue (in dollars) for the production and sale of x ski jackets are given by C(x) = 28x + 10,650 and R(x) =200x -0.4)(2 for OSXSSOO. L (A) Find the value of x where the graph of R(x) has a horizontal tangent line. . (8) Find the prot function P(x). ' (C) Find the value of x~where the graph of P(x) has a horizontal tangent line. (D) Graph C(x), R(x). and P(x) on the same coordinate system for 0 5 x5 500. Find the break-even points. Find the x-intercepts of the graph of P(x)