Engineering Economics
The depletion allowance method of computing depletion is commonly known as ______.

Factor method
Sinking fund method
Unit method
Percentage method

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Engineering Economics
In a cash flow series:

All of these
Either an increase or decrease in the amount of a cash flow is called the gradient
Uniform gradient signifies that an income or disbursement changes by the same amount in each interest period
The gradient in the cash flow may be positive or negative

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