Bruno's is analyzing two machines to determine which one it should purchase. The company requires a rate of return of 14.6 percent and uses straight-line depreciation to a zero book value over a machine's life. Ignore bonus depreciation and taxes. Machine A has a cost of $318,000, annual operating costs of $8,700, and a life of 3 years. Machine B costs $247,000, has annual operating costs of $9,300, and a life of 2 years. Whichever machine is purchased will be replaced at the end of its useful life. Which machine should Bruno's purchase and why?