3. Precision Plumbus is analyzing two machines to determine which one it should purchase. The company requires a 15 percent rate of return and uses straight-line depreciation to a zero book value over the life of its equipment. Machine A has a cost of $905,000, annual operating costs of $27,000, and a 4-year life. Machine B costs $1,025,000, has annual operating costs of $20,000, and has a 5-year life. Whichever machine is purchased will be replaced at the end of its useful life. Which machine should be purchased