When an asset is sold for more or less than its book value that was used for tax purposes, an adjustment must be made during the tax year the asset is disposed of$.$ If the asset is sold for more than its book value, the difference between the sales price and the book value is recorded as a $\_\_$ on the sale of an asset. If an asset is sold for less than its book value, the difference between the sales price and the book value is recorded as a$-$ onthe sale of an asset.