The internal rate of return method is used by Leach Construction Co. in analyzing a capital expenditure proposal that involves an investment of $400,125 and annual net cash flows of $75,000 for each of the eight years of its useful life.
a. Determine a present value factor for an annuity of $1 which can be used in determining the internal rate of return.
b. Using the factor determined in part (a) and the present value of an annuity of $1 table appearing Exhibit 5, determine the internal rate of return for the proposal.
Exhibit 5

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Present Value of an Annuity of $1 at Compound Interest 129% 0.893 1.690 2.402 3.037 3.605 Year 6% 0.943 1.833 2.673 3.465 4.212 4.917 5.582 6.210 6.802 7.360 0.909 1.736 2.487 3.170 3.791 4.355 4.868 5.335 5.759 6.145 15% 0870 1.626 2.283 2.855 3.353 3.785 4.160 4.487 4.772 5.019 2096 0.833 1.528 2.106 2.589 2.991 3.326 3.605 3.837 4.031 4.192 4.564 4.968 5.328 5.650 10