These latter, longer lives approximate economic depreciation, a concept economists have used to determine the actual life of an asset relative to its economic value.
en.wikipedia.org Indirect costs include repairs, depreciation, utilities, rent, sales tax, property tax, insurance, storage, and packaging.
en.wikipedia.org It describes the future value of a good in terms of percentage of depreciation of its initial value.
en.wikipedia.org Depreciation is used to record the declining value of buildings and equipment over time.
en.wikipedia.org Starting with, profit equals sales minus costs, it provides a structure for modeling cost elements such as materials, losses, multi-products, learning, depreciation etc.
en.wikipedia.org