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Three proposals are under review for equipment replacement atACME. ACME uses an MARR of 12.0% when evaluating the economiccontribution of investments. Data on the cost of each is shownbelow. Answer questions that follow based on this data.ProposalInvestment Amt12345A440,00036,00041,00042,00044,00071,000B280,00082,00088,00094,000100,000120,000C370,00054,00058,00061,00070,00090,000a. Using a rate of return method for analysis, what is the rateof return of the extra investment required to purchase the middlecost proposal in place of the lowest cost proposal?b. Using a rate of return method for analysis, what is the rateof return of the extra investment required to purchase the highestcost proposal in place of the lowest costproposal? c. Using a rate of return method for analysis, what is the rateof return of the extra investment required to purchase the highestcost proposal in place of the middle costproposal? d. Which of the three proposals makes the best economic valuefor ACME provided ACME has the capital to invest?