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73 Open with 11.15 An injection molding system has a first cost of $180,000, and an annual operating cost of $84,000 in years 1 and 2, increasing by $5000 per year thereafter. The salvage value of the system is 25% of the first cost regardless of when the system is retired within its maximum useful life of 5 years. Using a MARR of 15% per year, determine the ESL and the respective AW value of the system (a) by hand solution, and (b) via spreadsheet that graphs the total AW and its components. Ows activate Windows PE ENS 10 PM 1026/ msi