Question

In: Economics

A construction company is choosing between two backhoes. Options A is a wheel-mounted version, with an...

A construction company is choosing between two backhoes. Options A is a wheel-mounted version, with an initial cost of $65,000, an expected life of 6 years, and a salvage value of $5,000. Option B is a trackmounted version, with an initial cost of $85,000, a 9-year life, and a salvage value of $10,000. Both machines will achieve the same productivity. The interest rate is 9%.

a) What is the EUAC of option A ($/year)?

b) What is the EUAC of option B ($/year)?

c) If the interest rate is 12%, which option is preferred (A or B)?

Solutions

Expert Solution

The life of both the options is different. We have to convert the unequal life into equal life by using the common multiple method. The LCM of 6 years and 9 years is 18 years. So the Option A is repeated 3 times and the Option B is repeated 2 times.

a) What is the EUAC of option A ($/year)?

Initial Cost = 65,000

Salvage Value = 5,000

Interest rate = 9%

Step – 1 Calculate the PW

PW = 65,000 + 65,000 (P/F, 9%, 6) + 65,000 (P/F, 9%, 12) - 5,000 (P/F, 9%, 6) - 5,000 (P/F, 9%, 12) - 5,000 (P/F, 9%, 18)

PW = 65,000 + 65,000 (0.5963) + 65,000 (0.3555) - 5,000 (0.5963) - 5,000 (0.3555) - 5,000 (0.2120)

PW = 121,048

Step – 2

EUAC = PW (A/P, 9%, 18)

EUAC = 121,048 (0.1142)

EUAC = 13,824

b) What is the EUAC of option B ($/year)?

Initial Cost = 85,000

Salvage Value = 10,000

Interest rate = 9%

Step – 1 Calculate the PW

PW = 85,000 + 85,000 (P/F, 9%, 9) – 10,000 (P/F, 9%, 9) – 10,000 (P/F, 9%, 18)

PW = 85,000 + 85,000 (0.4604) – 10,000 (0.4604) – 10,000 (0.2120) = 117,410

Step – 2

EUAC = PW (A/P, 9%, 18)

EUAC = 117,410 (0.1142)

EUAC = 13,408

At interest rate 9%, EUAC of Option A = 13,824

                                      Option B = 13,408

Select the Option B.

c) If the interest rate is 12%, which option is preferred (A or B)?

What is the EUAC of option A ($/year)?

Initial Cost = 65,000

Salvage Value = 5,000

Interest rate = 12%

Step – 1 Calculate the PW

PW = 65,000 + 65,000 (P/F, 12%, 6) + 65,000 (P/F, 12%, 12) - 5,000 (P/F, 12%, 6) - 5,000 (P/F, 12%, 12) - 5,000 (P/F, 12%, 18)

PW = 65,000 + 65,000 (0.5066) + 65,000 (0.2567) - 5,000 (0.5066) - 5,000 (0.2567) - 5,000 (0.1300)

PW = 110,148

Step – 2

EUAC = PW (A/P, 12%, 18)

EUAC = 110,148 (0.1379) = 15,189

What is the EUAC of option B ($/year)?

Initial Cost = 85,000

Salvage Value = 10,000

Interest rate = 12%

Step – 1 Calculate the PW

PW = 85,000 + 85,000 (P/F, 12%, 9) – 10,000 (P/F, 12%, 9) – 10,000 (P/F, 12%, 18)

PW = 85,000 + 85,000 (0.3606) – 10,000 (0.3606) – 10,000 (0.1300) =

Step – 2

EUAC = PW (A/P, 12%, 18)

EUAC = 110,745 (0.1379) = 15,272

At interest rate 12%, EUAC of Option A = 15,189

                                      Option B = 15,272

Select the Option A.


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