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How much should the smog control district pay to the firm now to provide for the first cost of the equipment and its maintenance for 10 years?
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Answer to Problem 55P
$11,292
Given information:
Maintenance cost for 1st year (A1) = $75
Cost will increase by $150 each year, so G=$25
Time (n) = 10 years
Interest rate (i) = 6%.
Concept used:
Arithmetic gradient present worth is given by,
To find the Present Worth, at EOY 0, of a gradient series that begins EOY 1, use
To find the annual equivalent (A series) of a gradient series that begins EOY 1, use
Calculation:
In order to find out the present worth of the cash maintenance cash flow we use the given formula,
To find the Present Worth, at EOY 0, of a gradient series that begins EOY 1, use
Arithmetic gradient present worth is given by,
The upper cash flow is equivalent to a uniform series of A = 75 for 10 years, an arithmetic series of G = 25 for 10 years, a single cash flow of $10,000 in the year 0, so the present worth of the above cash flow is
Conclusion:
Thus, the smog control district pays to the firm $11,292 now to provide for the first cost of the equipment and its maintenance for 10 years.
Explanation of Solution
Given information:
Maintenance cost for 1st year (A1) = $75
Cost will increase by $150 each year, so G=$25
Time (n) = 10 years
Interest rate (i) = 6%.
Concept used:
Arithmetic gradient present worth is given by,
To find the Present Worth, at EOY 0, of a gradient series that begins EOY 1, use
To find the annual equivalent (A series) of a gradient series that begins EOY 1, use
Calculation:
In order to find out the present worth of the cash maintenance cash flow we use the given formula,
To find the Present Worth, at EOY 0, of a gradient series that begins EOY 1, use
Arithmetic gradient present worth is given by,
The upper cash flow is equivalent to a uniform series of A = 75 for 10 years, an arithmetic series of G = 25 for 10 years, a single cash flow of $10,000 in the year 0, so the present worth of the above cash flow is
Conclusion:
Thus, the smog control district pays to the firm $11,292 now to provide for the first cost of the equipment and its maintenance for 10 years.
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ENGINEERING ECO ANALYSIS W/STUDY GUIDE
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