Algebraic Revenue Function

"The total revenue function for a product is given by R = 266x, and the total cost function for the same product is C = 2000 + 46x + 2x2, where R and C are each measured in thousands of dollars and x is the number of units produced and sold. a. Form the profit function for this product from the two given functions. b. What is the profit when 55 units are produced and sold? c. How many units must be sold to break even on this product? "