Answer: To find the book value of a plant asset, you find the difference between the "B : cost of the asset and the accumulated depreciation to date.".
Explanation: Plant assets are the assets that the company uses to carry out its activity and that have a useful life of more than 1 year. As examples we can mention: machinery, installations, furniture and tools, wheeled, real estate, etc.-
They are valued at residual value or net value is also called book value and arises from the difference between the source value and the value of accumulated depreciation.
Book value = Origin value - Accumulated Depreciation
Because the depreciation represents the wear of the asset, therefore the value at the date of the asset is, its original cost minus its accumulated depreciation