Bailey, Inc., is considering buying a new gang punch that would allow them to produce circuit boards more efficiently. The punch has a first cost of $100,000 and a useful life of 15 years. At the end of its useful life, the punch has no salvage value. Labor costs would increase $2,000 per year using the gang punch, but raw material cost would decrease $12,000 per year. MARR is 5% per year. (a) What is the discounted payback period for this investment (b) If the maximum attractive DPBP is 3 years, what is the decision rule for judging the worth of this investment (c) Should Bailey buy the gang based on DPBP?