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IRR = iNPV + +<br />

NPV+<br />

NPV + NPV<br />

+<br />

−<br />

(iNPV + iNPV)<br />

IRRC-A = 15% + 30,172+45,537 (20%-15%)<br />

IRRC-A = 15% + 1,99% = 16,99%<br />

Karena IRRC-A >>> > MARR = 15%, maka alternatif C maju dan alternatif A gugur.<br />

Incremental IRR (B-C)<br />

NPV B-C = -I+Ab(P/A,i*,n)-Gb(P/G,i*,n) +S(P/Fi*,n)-Ac(P/ A,i*,n)<br />

NPV B-C = -300+ 100(P/A,i*,8)-5 (P/G,i*,8) +370(P/Fi*,8)- 130(P/A,i',8)<br />

Jika i=15%, maka:<br />

NPV B-C = -300+100(P/A,15,8)-5(P/G, 15,8) +370(P/F,15,8)- 130(P/A,15,8)<br />

NPV B-C = -300+100(4.487)-5(12.481)+370(0.3269)130(4.487)<br />

NPV B-C = -Rp 376,062 juta<br />

Jika i=10%, maka:<br />

NPV B-C = -300+100(P/A,10,8)-5(P/G,I0,8) +370(P/F,10,8)- 130(P/A,10,8)<br />

NPV B-C = -300+100(5.335)-5(16,029)+370(0.4665)130(5.335)<br />

NPV B-C = - Rp 367,59 juta<br />

Dari perhitungan NPV incremental terlihat kecendurungan nilai NPV negatif dan tidak<br />

mempunyai titik IRR. Oleh karena itu, dapat dipastikan IRR B-C

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