This document discusses the accounting treatment for the disposal of plant and equipment assets. It covers three key points: 1) When plant assets are disposed of, their costs are removed from the asset account and accumulated depreciation is removed from the related account. Gains or losses may result depending on if the disposal price is above or below the asset's book value. 2) If assets are traded in for new ones, the trade-in allowance is compared to book value to determine if a gain or loss on disposal should be recorded. 3) Examples are provided to illustrate accounting entries for scrapping fully depreciated assets, disposing of assets at prices above or below book value, and trading in