Part A-B

Part A.) for a study period of 4 years, use present worth (PW) analysis to select the better method.

Part B.) Use PW analysis to select the better method. (USE LCM)

Problem 2 (20 points) An environmental engineer must recommend one of two methods for monitoring high colony counts of E.coli and other bacteria in watershed area "hot spots. Estimates are shown in the table and the MARR is 10% per year. Machine R Machines First cost (S) -250,000 -370,500 AOC ($/year) -40,000 -50,000 Salvage value (S) 20,000 20,000 Life (year) - 12 8