a. What is the PW for Heater B at t=12? Round to the nearest integer.

b. Which heater should be purchased?

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 6 8 12