Best Flight, Inc., is considering three mutually exclusive alternatives for imple- menting an automated passenger check-in counter at its hub airport. Each alternative meets the same service requirements, but differences in capital investment amounts and benefits (cost savings) exist among them. The study period is 10 years, and the useful lives of all three alternatives are also 10 years. Market values of all alternatives are assumed to be zero at the end of their useful lives. If the airline's MARR is 10% per year, which alternative should be selected in view of the cash-flow diagrams shown on page 248? SECTION 6,4 / Usorul Lives Art EQUAL TO THE STUDY PERIOD 247 6.4 Useful Lives Are Equal to the Study Period When the useful life of an alternative is equal to the selected study period, adjustments to the cash flows are not required. In this section, we discuss the comparison of mutually exclusive alternatives, using equivalent-worth methods and rate-of-return methods when the useful lives of all alternatives are equal to the study period. 6.4.1 Equivalent-Worth Methods In Chapter 5, we learned that the equivalent-worth methods convert all relevant cash flows into equivalent present, annual, or future amounts. When these methods are used, consistency of alternative selection results from this equivalency relationship. Also, the economic ranking of mutually exclusive alternatives will be the same when using the three methods. Consider the general case of two alternatives A and B. IF PWG%)