Question

In: Economics

1. Three mutually exclusive projects are being considered. The cash flows for each and corresponding rate...

1. Three mutually exclusive projects are being considered. The cash flows for each and corresponding rate of return are list below. MARR = 8% can any project eliminated? Using functional notation to solve for the incremental rate of return.

1 2 3
0 -20000 -25000 -29000
1 2000 2500 3000
2 5000 6200 7000
3 8000 9900 11000
4 11000 13600 15000
ROR 9% 8.7% 7.4%


2. Which project must you choose based on the information provided below using conventional payback period.

1 2 3 4
Initial cost 50000 30000 60000 45000
Annual Revenues 6500 4200 7700 7400
Length of ownership 10 15 10 6

Solutions

Expert Solution

1.

1

2

3

ROR

9%

8.70%

7.40%

From the above it can be seen that the project 3 has ROR that is less than the MARR. Hence project 3 can be eliminated if MARR is 8%.

So let’s consider project 1 & 2 for the evaluation and calculate the incremental rate of return of the incremental cash flow of 2 – 1

1

2

Incremental cash flow between cash flows of 2 and cash flows of 1

0

-20000

-25000

-25000 – (-20000) = -5000

1

2000

2500

2500 – 2000 = 500

2

5000

6200

6200 – 5000 = 1200

3

8000

9900

9900 – 8000 = 1900

4

11000

13600

13600 – 11000 = 2600

Calculating ROR by using trial and error method

PW of the ICF at MARR of 8%

PW at 8% = -5000 + 500 (1+.08) -1 + 1200 (1+.08) -2 + 1900 (1+.08) -3 + 2600 (1+.08) -4 = -89

As the PW is negative decrease the rate of interest to get positive NPW. Let the interest rate is 7%.

PW at 7% = 5000 + 500 (1+.07) -1 + 1200 (1+.07) -2 + 1900 (1+.07) -3 + 2600 (1+.07) -4 = 50

Using interpolation

Rate of Return = 7 + [50 – 0 ÷ 50 – (-89)]*1% = 7.35%

ROR of 2 – 1 < MARR – Select Project 1

2. Which project must you choose based on the information provided below using conventional payback period.

1

2

3

4

Initial cost

50000

30000

60000

45000

Annual Revenues

6500

4200

7700

7400

Length of ownership

10

15

10

6

Payback period

50000/6500 =7.69 years

30000/4200 = 7.14 years

60000/7700 = 7.79 years

45000/7400 = 6.08 years

ACCEPTABLE

ACCEPTABLE

ACCEPTABLE

REJECTED

ACCEPT PROJECT 2 BECAUSE OF LOWEST PAYBACK PERIOD.

Note – Payback period = Initial cost/Annual revenues.


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