Depreciation Expense is an estimate as is an asset's useful life. Do you think it makes sense to estimate this? Why or why not? If not, what do you think could be a better option as to how to record an asset's usage into the financial statements? Leave the value as is? Keep detailed track of the asset's usage and reduce the asset's value exactly as it is used? Other? Also, do you think it is helpful to FS users to see both the historical cost and the book value of an asset? Why or why not? Do you think it would be more beneficial to simply show the book value? Why or why not?