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LO 3 5. Calculating IRR. A firm evaluates all of its projects by applying the IRR rule. If the required return is 11 percent, should the firm accept the following project? Year Cash Flow $168,500 86,000 91,000 53,000 LO 4 6. Calculating NPV. For the cash flows in the previous problem, suppose the firm uses the NPV decision rule. At a required return of 9 percent, should the firm accept this project? What if the required return was 21 percent