Suppose a company's revenue R (in dollars) from the sale of x units of its product is given by R 290x. Suppose further that the total costs C (in dollars) of producing those x units is given by C 60x+13,000. (a) If profit is revenue minus cost, find an expression for the profit from the production and sale of x units. P = (b) Find the profit received if 3500 units are sold. P = $