Engineering Economics
A mathematical expression also known as the present value of annuity of one is called ______.

Demand factor
Sinking fund factor
Load factor
Present worth factor

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Engineering Economics
Using factor method, the depletion at any given year is equal to:

Initial cost of property times number of unit sold during the year divided by the total units in property
Initial cost of property times number of units sold during the year
Initial cost of property divided by the total units in property
Initial cost of property divided by the number of units sold during the year

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