MC Qu. 138 Why can depreciation expense be a Why can depreciation expense be a different amount each year using the units-of-production method? O The method calculates expense based on the relationship between each year's output and total estimated output O The method calculates expense based on cost divided by the expected useful life. O The units-of-production method is an accelerated depreciation method. O The units-of-production method is based on the difference in the appraisal value of the asset from one year to the next