Equivalent annual cost calculation Dossman Metal Works, Inc

(Equivalent annual cost calculation) Barry Boswell is a financial analyst for Dossman Metal Works, Inc. and he is analyzing two alternative configurations for the firm's new plasma cutter shop. The two alternatives that are denoted A and B below perform the same task and although they each cost to purchase and install they offer very different cash flows. Alternative A has a useful life of 7 years whereas Alternative B will only last for 3 years. The after-tax cash flows from the two projects are as follows: