PART 2: DEFINE THE FIVE (5) METHODS FOR COMPUTING BOOK DEPRECIATION As the Practice Manager . you are tasked with explaining the depreciation methods to Dr . Smith and Dr. Brown . Write an explanation of each method in your own words . Straight Line Depreciation Straight Line Depreciation Is when an organization is reducing the amount of inventory . First you have to find the cost of the asset and estimate the salvage value then subtract the asset and divide by useful life . The Salvage value is the amount estimated value at the end of its useful lifetime