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Conventional 8-D II Problem 2. Compare the following mutually exclusive alternatives using the conventional incremental B/C ratio with annual worth to determine the most economical alternative with an interest rate of 15% per year. The Do Nothing option does not exist. B. B-D-M&0 Modified C Initial Invetment ied PW of NCF PI = PW of initial investment Initial Cost ($) Maintenance cost (S/yr) Income (S/y) Life (years) X 50K 20K 120K 10 Y 75K 25K 170K 15 z 25K 30K 150K 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 = 15% PIF AVF PIG 0.8696 1.1500 1.0000 0.000 0.7561 0.6151 0.4651 0.756 0.6575 0.4380 0.2880 2.071 0.5718 0.3503 0.2003 3.786 0.4972 0.2983 0.1483 5.775 0.4323 0.2642 0.1142 7.937 0.3759 0.2404 0.0904 10.192 0.3269 0.2229 0.0729 12.481 0.2843 0.2096 0.0596 14.755 0.2472 0.1993 0.0493 16.979 0.2149 0.1911 0.0411 19.129 0.1869 0.1845 0.0345 21.185 0.1625 0.1791 0.0291 23.135 0.1413 0.1747 0.0247 24.972 0.1229 1710