56:054 Engineering Economy

Prof. O'Grady

  1.  
  1. What is meant by leverage? (5 points)
  2. The degree to which an investor or business is utilizing borrowed money.

    For example, if you decided to invest your $10,000 in real estate. You can purchase a 100,000 worth house by using your $10,000 plus $90,000 borrowed (loan) money. Think about the possible return/loss of your $10,000 if your house increase/decrease its value by 10% after 1 year.....

  3. What usually happens when a person with a 72 month loan for the full price of a new car sells that car after 2 or 3 years? (5 points)
  4. This person would take a capital loss.

  5. In chapter 12, what is meant by a challenger and a defender? (5 points)

Defender: the previously implemented asset in a replacement analysis.

Challenger: the best current available asset in a replacement analysis.

  1. A prospective piece of equipment has the following marginal cost structure. Calculate (use shorthand notation) the EUAC for years 1 and 2 (10 points)

Year Total Marginal Cost

    1. $17,750
    2. $ 15,200

EUAC or Year 1: 17750(P/F,i,1)(A/P,i,1)

EUAC of Year 2: [17750(P/F,i,1) + 15200(P/F,i,20](A/P,i,2)

 

  1. A person is in the 39.6% marginal federal income tax category and the marginal state income tax rate is 12%. What is their combined incremental tax rate? (10 points)
  2. Combined incremental tax rate = marginal state income tax rate + marginal federal income tax rate x (1 - marginal state income tax rate)

    = 12% + 0.396(1-12%) = 46.8%

     

  3. A company is considering purchasing a $10,000 computer system with an expected life of 5 years and zero salvage value. The company will save an estimated $3,000 per year for the five years. Assume straight-line depreciation. Calculate the after tax cash flow for years 0-5 with a marginal tax rate of 30%. (15 points)

Year

Before-Tax

Cash flow(1)

Straight-line depreciation(2)

Taxable income(1)+(2)

30% Income taxes

After-tax cash flow

0

-$10,000

   

-$10,000

1

+$3,000

-$2,000

$1,000

$300

+$2,700

2

+$3,000

-$2,000

$1,000

$300

+$2,700

3

+$3,000

-$2,000

$1,000

$300

+$2,700

4

+$3,000

-$2,000

$1,000

$300

+$2,700

5

+$3,000

-$2,000

$1,000

$300

+$2,700

 

 

 

 

 

 

 

 

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  [ Professor O'Grady ]