Bannawanna Corporation was building a customized wazit machine for a customer. The customer declared bankruptcy. Bannawanna had expended $200,000 in materials and $500,000 in labor and overhead on the machine at the time the customer declared bankruptcy The company could rework the machine at a cost of 515 000 and se it for $200,000. The machine could simply be sold as scrap for 560,000. a. What is the amount of "sunk costs"? $ b. What is the incremental contribution to profit if it is reworked and sold? S c. What is the incremental contribution to profit if the machine is scrapped? d. The company should select (rework, scrap) to maximize net profit under the circumstances