VDB

VDB ( cost , salvage , life , start-period , end-period [ , [ [ factor ][ , [ no-switch-flag ] ] ] ] ] )

Description: Computes the depreciation of an asset for the period specified, including partial periods, using the double-declining balance or some other specified method.

Arguments:

Name	Type	Description
cost	number	The number cost is the initial cost of the asset.
salvage	number	The value at the end of the depreciation. (This is sometimes called the salvage value of the asset.) This value can be 0.
life	number	The number of periods over which the asset is being depreciated. (This is sometimes called the useful life of the asset.)
start-period	number	The starting period for which the depreciation is to be calculated. (start-period shall use the same units as life.)
end-period	number	The ending period for which the depreciation is to be calculated. (end-period shall use the same units as life.)
factor	number	The rate at which the balance declines. If omitted, it is assumed to be 2 (the double-declining balance method).
no-switch-flag	logical	Specifies whether to switch to straight-line depreciation when depreciation is greater than the declining balance calculation. If `TRUE`, straight-line depreciation is not used even when the depreciation is greater than the declining balance calculation. If `FALSE` or omitted, the straight-line depreciation is used when depreciation is greater than the declining balance calculation.

Return Type and Value: number – The depreciation of an asset for the period specified.

However, if any numerical argument value is non-positive, #NUM! is returned.

example: