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Refer to example 6-3. Re-evaluate the recommended alternative if (a) the MARR= 15% per year; (b)...

Refer to example 6-3. Re-evaluate the recommended alternative if (a) the MARR= 15% per year; (b) the selling price is $0.50 per good unit; and (c) rejected units can be sold as scrap for $0.10 per unit. Evaluate each change individually. (d) What is the recommended alternative if all three of these changes occur simultaneously.

EXAMPLE6-3

MARR= 10% Annual Output
Capacity
120,000
Useful Life= Selling Price= $0.38
Expenses P1 P2 P3 P4
Capital
Investment=
$24,000 $30,400 $49,600 $52,000
Power= $2,720 $2,720 $4,800 $5,040
Labor= $26,400 $24,000 $16,800 $14,800
Maintenance= $1,600 $1,800 $2,600 $2,000
Tax and
Insurance=
$480 $608 $992 $1,040
EOY P1 P2 P3 P4
0 $24,000 $30,400 $49,600 $52,000
1 $31,200 $29,128 $25,192 $22,880
2 $31,200 $29,128 $25,192 $22,880
3 $31,200 $29,128 $25,192 $22,880
4 $31,200 $29,128 $25,192 $22,880
5 $31,200 $29,128 $25,192 $22,880
PW= $142,273 $140,818 $145,098 $138,733
AW= $37,531 $37,147 $38,276 $36,597
FW= $229,131 $226,789 $233,681 $223,431

Solutions

Expert Solution

Current Ranking of the projects are as below based on data provided in the question :

EOY P1 P2 P3 P4
PW= $142,273 $140,818 $145,098 $138,733
AW= $37,531 $37,147 $38,276 $36,597
FW= $229,131 $226,789 $233,681 $223,431
PW= Rank 3 2 4 1
AW= Rank 3 2 4 1
FW= Rank 3 2 4 1

Since the outgo is least in P4 , as per current position P4 should be selected.

Now (a) If the MRR is changed to 15% :

EOY P1 P2 P3 P4
PW=         128,587         128,042         134,047         128,697
AW=            38,360            38,197            39,988            38,392
FW=         258,635         257,537         269,617         258,856
PW= Rank 2 1 4 3
AW= Rank 2 1 4 3
FW= Rank 2 1 4 3

After change in MRR to 15% Project 2 becomes preferable.

Workings :

(1) PW ; MARR@15% , Discounting Factor = 1,0.87,0.76,0.66,0.57,0.50 , DF is to be multiplied with annual cash out go then we get PW of 24000,27130,23592,20515,17839,15512 respectively for P1 and thus total PW =128,587. Similarly computed for other altenatives.

(2) AW : MARR@15% ;

e.g. for P1 , AW of initial investment of $1 0.298 so AW for P1 for initial investment $24,000=7160

Total AW = 7160+31200=38,360 (31200 is equal per annum outflows)

(3) FW = future value of all outflows i.e. compounding the amounts @15% MARR.

(b) , (c) Since further information as to sale or production of the units have not been given , there will not be any change on evluation if SP is changed or whther rejected units can be sold at any price. Assuming these parameters same for all 4 alternatives P4 is the answer if these changes occur.

(d) P2 is the answer .


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