Alternative X has a first cost of $30,000, an operating cost of $9,000 per year, and a $5,000 salvage value after 5 years. Alternative Y will cost $45,000 at ned with an operating cost of $4,000 per year after that and a salvage value of $7.000 after 5 years. At an MARR ?of 12% per year, what is the present worth for alternative Y $58,557 555.447 $55.998 $54,778 Assume $100,000 is available for investment and MARR = 10% per year. If alternative A would earn 25% per year on investment of 7$60,000, and B would earn 20% per year on investment of $75,000, which alternatives should be selected Both alternatives A and B Alternative B None of the alternatives Alternative A