A company has designed a system to automate the loading and unloading of a furnace. related costs follow: robot, $80,000; associated hardware for the robot, $5,500; fixtures, $7,000; and interfacing the robot with the furnace, $4,500. it is estimated that no new maintenance personnel will be required but approximately $1,500 per month may be required for maintenance and preventive maintenance. no additional programming costs are expected. training for the programmer and maintenance will cost $5,000. the furnace will run three shifts, freeing three employees to do other work. the average cost of each worker, including fringe benefits, is $25,000. the company has decided to depreciate the equipment over five years. it is expected to save $7,500 each year in productivity improvements. what is the payback period? if the company requires payback of 40 fewer months, should the project be undertaken?