Q.1 : Necessary assumption to compare mutually exclusive alternatives of different lives :
Answer :
1)The usage of machine are needed for the indefinite future.
2) The selected alternative will be repeated for succeeding life cycles in exactly the same manner as for the first life cycle.
3) All cash flows will have the same estimated values in every life cycle.
Q.2 : Which alternative is more economic based on Annual worth comparison
Machine A is more economic since Machine A Annual value cash outflow is $ 2210 whereas Machine B has $2336
Machine-A Calculation
Running Cost | Maintenance Cost | Salvage Value | Total Cost |
1,200 | 600 | 1,800 | |
1,200 | 700 | 1,900 | |
1,200 | 800 | 2,000 | |
1,200 | 900 | 2,100 | |
1,200 | 1,000 | 2,200 | |
1,200 | 1,100 | (400) | 1,900 |
NPV | 9,411 | ||
Price of Machine A | 6,400 | ||
Total NPV of Machine A (a) | 15,811 | ||
6 Year Annuity Value @ 7% (b) | 7.1533 | ||
Annual Value Comparison (a/b) | 2,210 |
Machine B Calculation
Running Cost | Maintenance Cost | Salvage Value | Total Cost |
1,400 | 400 | 1,800 | |
1,200 | 540 | 1,740 | |
1,200 | 680 | 1,880 | |
1,200 | 820 | (400) | 1,620 |
NPV | $5,973 | ||
Price of Machine B | 4,400 | ||
Total NPV of Machine B (a) | $10,373 | ||
4 Year Annuity @ 7% (b) | 4.4399 | ||
Annual Comparison (a/b) | $2,336 |
Q.3 Which alternative is more economic based on Present worth comparison
Present Worth means Net Present Value. Machine B is more economic based on Present worth comparison since it has $ 10,373 cash outflow whereas Machine A has $ 15,811
Q.4 For a four year study period, what salvage value for machine A would make it preferred choice
Salvage value greater than 3415 will make Machine A preferred choice since at salvage value 3415 the annual comparison worth of both machine is $ 2336
Machine-A Calculation | |||
Running Cost | Maintenance Cost | Salvage Value | Total Cost |
1,200 | 600 | 1,800 | |
1,200 | 700 | 1,900 | |
1,200 | 800 | 2,000 | |
1,200 | 900 | (3,415) | (1,315) |
NPV | 3,971 | ||
Price of Machine A | 6,400 | ||
Total NPV of Machine A (a) | 10,371 | ||
6 Year Annuity Value @ 7% (b) | 4.4399 | ||
Annual Value Comparision (a/b) | 2,336 | ||
Machine B Calculation | |||
Running Cost | Maintenance Cost | Salvabe Value | Total Cost |
1,400 | 400 | 1,800 | |
1,200 | 540 | 1,740 | |
1,200 | 680 | 1,880 | |
1,200 | 820 | (400) | 1,620 |
NPV | $5,973 | ||
Price of Machine B | 4,400 | ||
Total NPV of Machine B (a) | $10,373 | ||
4 Year Annuity @ 7% (b) | 4.4399 | ||
Annual Comparison (a/b) | $2,336 |
Q.5 Do the both method yield same result
No as evident from above both method yield different result. Present worth comparison yield same result when life of both machine is same however when life is different present worth comparison method is not useful and need to use annual worth comparison method.
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