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Please help!!! Engineering Economics class homework!!

Potable water is in short supply in many countries. To address this need, two mutually exclusive water purification systems a


attached below are the tables needed!! first picture is alternative options, second picture is i=9% values, third picture is i=18% values!!!
2 of 3 (0 complete) - (algorithmic) mort supply in many countries. To address this need, two mutually exclusive water impleme
1. Ompung LCHF es 2 of 3 (0 complete) HW Score: 4 (algorithmic) Ques re Info AF WN - Discrete Compounding: 79% Single Payment
es 2 of 3 (0 complete) HW Score: 4 (algorithmic) Questi re Info Capital Recovery Factor To Find A Given P F/P FIA AF AP Discr
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Answer #1

When MARR = 9%

NPW of the first system = -100000 + (45000-22000)*(P/A,9%,10) - (100000 - 20000) * (P/F, 9%,5) + 20000 * (P/F, 9%,10)

= -100000 + 23000*6.417658 - 80000 * 0.649931 + 20000 * 0.422411

= 4059.86

NPW of system 2 = -150000 + (60000-40000)*(P/A,9%,10)

= -150000 + 20000* 6.417658

= -21646.85

First option should be selected as NPW is positive

When MARR = 18%

NPW of the first system = -100000 + (45000-22000)*(P/A,18%,10) - (100000 - 20000) * (P/F, 18%,5) + 20000 * (P/F, 18%,10)

= -100000 + 23000*4.494086 - 80000 * 0.437109 + 20000 * 0.191064

= -27783.44

NPW of system 2 = -150000 + (60000-40000)*(P/A,18%,10)

= -150000 + 20000* 4.494086

= -60118.27

First option should be selected as present cost is less

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