Returns the depreciation of an asset in a single period using the straight-line depreciation method.
SLN(originalcost, salvagevalue, lifetime)
originalcost: the initial cost of the asset.
salvagevalue: is the value at the end of the depreciation (sometimes called the salvage value of the asset).
lifetime: the number of periods (commonly years) over which the asset is being depreciated.
The straight-line depreciation method depreciates the asset by the same constant value every period; that value is returned by the SLN function. The formula is:
( originalcost - salvagevalue ) / lifetime.
SLN(14000, 4000, 5)
returns 2000 in currency units. The asset depreciates 2000 in each of the 5 years of its working life.