Engineering Economics
What refers to the cost of borrowing money or the amount earned by a unit principal per unit time?

Rate of return
Rate of interest
Economic return
Yield rate

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Engineering Economics
Under the depletion allowance method in computing depreciation, the depletion charge is equal to either ______ whichever is smaller.

Fixed percentage of gross income or 50% of the net taxable income
50% of the fixed percentage of gross income or the net taxable income
50% of the fixed percentage of gross income or 50% of the net taxable income
Fixed percentage of gross income or the net taxable income

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