5.9 The TT Racing and Performance Motor Corpora- tion wishes to evaluate two alternative machines for NASCAR motor tuneups. Use the AW method at 9% per year to select the better alternative. Machine R Machine S - 250.000 -370.500 First cost, $ Annual operating cost, $ per year -40.000 - 50.000 Life, years 3 5 Salvage value, $ 20.000 20.000