47. Reconsider Problem 5 (repeated here). Bailey, Inc., is considering buying a new gang punch that would allow them to produce circuit boards more effi -

ciently. The punch has a fi rst 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 costs would decrease $12,000 per year. MARR is 5 percent/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 punch based on DPBP?