2. National Homebuilders has a standard practice of evaluating all options over a 5-year period. If a study period of 5 years is used and the salvage values are not expected to change, which vendor should be selected ...? Vendor A Vendor B First cost, $ -15,000 -18,000 Annual MAO cost, S per year -3.500 -3,100 Salvage value, $ 1.000 2,000 Life, years 6