Question

9-50 Consider four mutually exclusive alternatives: (Α) A B C D Cost $75.0 $50.0 $15.0 $90.0 Uniform annual 18.8 13.9 4.5 23.

please show excel formulas so I can understand the problem

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Answer #1

(a)

Year (n) Cash flow from project A (CF) Cumulative cash flow Cash flow from project B (CF) Cumulative cash flow Cash flow from project C (CF) Cumulative cash flow Cash flow from project D (CF) Cumulative cash flow
0 -$75 -$75 -$50 -$50 -$15 -$15 -$90 -$90
1 $18.8 -$56 $13.9 -$36 $4.5 -$10.5 $23.8 -$66.2
2 $18.8 -$37 $13.9 -$22 $4.5 -$6.0 $23.8 -$42.4
3 $18.8 -$19 $13.9 -$8 $4.5 -$1.5 $23.8 -$18.6
4 $18.8 $0.2 $13.9 $6 $4.5 $3.0 $23.8 $5.2
5 $18.8 $19 $13.9 $20 $4.5 $7.5 $23.8 $29.0
(In Years)
Payback Period for project A = 3.99
Payback Period for project B = 3.60
Payback Period for project C = 3.33 Lowest
Payback Period for project D = 3.78
Payback Period (period where cumulative cash flow is zero) = X + (Y/Z)
Where,
X = Last period with a negative cumulative cash flow;
Y = Absolute value of cumulative cash flow at the end of the period X;
Z = cash flow during the period after X.

Project C should be selected as it has lowest payback period

(b)

Year (n) Cash flow from project A (CF) Future worth [=CF*(1+MARR)^(5-n)] Cash flow from project B (CF) Future worth [=CF*(1+MARR)^(5-n)] Cash flow from project C (CF) Future worth [=CF*(1+MARR)^(5-n)] Cash flow from project D (CF) Future worth [=CF*(1+MARR)^(5-n)] Formula used
0 -$75 -$121 -$50 -$81 -$15 -$24 -$90 -$145 CF*(1+10%)^5
1 $18.8 $28 $13.9 $20 $4.5 $6.6 $23.8 $35 CF*(1+10%)^4
2 $18.8 $25 $13.9 $19 $4.5 $6.0 $23.8 $32 CF*(1+10%)^3
3 $18.8 $23 $13.9 $17 $4.5 $5.4 $23.8 $29 CF*(1+10%)^2
4 $18.8 $21 $13.9 $15 $4.5 $5.0 $23.8 $26 CF*(1+10%)^1
5 $18.8 $19 $13.9 $14 $4.5 $4.5 $23.8 $24 CF*(1+10%)^0
Net Future Worth (Sum of future worth) -$6.01 $4.34 $3.32 $0.36
Highest

Project B should be selected as it has highest net future Worth

(c)

To calculate benefit-cost (B-C) ratio, first we have to calculate present worth (PW) of benefits and present worth of cost.

The cost is at zero periods therefore its present worth of cost (C)

Year (n) Cash flow from project A (CF) Present Worth of benefits [=CF/(1+MARR)^n] Cash flow from project B (CF) Present Worth of benefits [=CF/(1+MARR)^n] Cash flow from project C (CF) Present Worth of benefits [=CF/(1+MARR)^n] Cash flow from project D (CF) Present Worth of benefits [=CF/(1+MARR)^n] Formula used
0 -$75 -$50 -$15 -$90
1 $18.8 $17 $13.9 $13 $4.5 $4.1 $23.8 $21.6 CF/(1+10%)^1
2 $18.8 $16 $13.9 $11 $4.5 $3.7 $23.8 $19.7 CF/(1+10%)^2
3 $18.8 $14 $13.9 $10 $4.5 $3.4 $23.8 $17.9 CF/(1+10%)^3
4 $18.8 $13 $13.9 $9 $4.5 $3.1 $23.8 $16.3 CF/(1+10%)^4
5 $18.8 $12 $13.9 $9 $4.5 $2.8 $23.8 $14.8 CF/(1+10%)^5
Present Worth of Benefits $71.27 $52.69 $17.06 $90.22
Benefit/cost ratio (B/C ratio) (PW of benefits/PW of cost) 0.95 1.05 1.14 1.00
Highest

Project C should be selected as it has highest B/C ratio

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