A firm is considering three different modes of transportation to deliver its product to customers. Fixed and variable cost associated with each transportation mode is given below. Mode Fixed Cost Variable Cost/Unit Truck $ 900 $ 3 Piggyback $ 800 $ 7 Rail $ 400 $ 12 a. Calculate trade-off (breakeven) points between Truck and Piggyback, Truck and Rail, Piggyback and Rail. b. Draw a figure to show trade-off points. c. When should each of these modes be selected by the firm?