3. Three mutually exclusive alternatives for implementing an office automation plan in an engineering design firm are being considered. Each alternative meets the same service requirements, but different in capital investment amounts and benefits exists among them. All has the same life span of 10 years. Alternative Capital Investment $390,000 $920,000 167,000 40,000 $660,000 133,500 20,000 Annual cost savings 69,000 30,000 Salvage @ EOL If the firm's MARR is 10% per year, which alternative should be selected in view of the financial estimates? a. b. What are the Benefit-Cost (B/C) ratios of these alternatives? c. What are the pay-back (P-B) Period values of these alternatives