13 5. The following costs are associated with three mutually exclusive alternatives as part of a production improvement program. If the rate of 12% is used, which is the best alternative? Use NPW to make your decision. (Note: Consider the least common multiple as the study period.) (30 Points) Alternative A B C First cost $55,000 $60,000 $75,000 O&M costs 16,000 10,000 12.000 Annual benefit 36,000 30.000 35,000 Salvage value 14.000 20,000 25.000 Useful life, in years 4 6 12