$1.$ The period of time over which the company anticipates deriving benefit from the use of the asset

$2.$ The cost of the asset minus its accumulated depreciation

$3.$ The total amount of depreciation expense that has been recorded for an asset since the asset was acquired

$4.$ The amount of cash or trade$-$in consideration that the company expects to receive when an asset is retired from service

$5.$ A process of cost allocation, not an attempt to measure the fair value of an asset