a) When the useful lives of alternatives differ, we can use _____ of their useful lives to determine our analysis period?

b) Based on your answer in part a, what would be the analysis period we would need to for this problem?

c) What is the PW for Heater B using the useful life you calculated in part b? Round to the nearest integer.

Alex needs to replace heater for his business, and he is considering the following options. Use MARR=8%. Heater A Heater B Heater C Electric powered Gas powered Solar powered Initial Cost $4500 $5000 $7000 Annual operating cost $800 $700 $500 Salvage Value $1000 $800 $1500 Useful Life 8 12