FINANCE.DB(cost, salvage, life, period, month = 12)
Calculate the depreciation of an asset for a specified period using the arithmetic declining balance method.
- cost: Initial cost of the asset.
- salvage: The asset's value at the end of depreciation.
- life: The number of periods over which the asset is depreciated.
- period: The single period within the asset's life for which to calculate depreciation.
- month: The number of months in the first year of depreciation. 12 by default.