On January 2, Walston, Inc. purchased and installed a new machine costing $670,000 with a five-year useful life and an estimated $70,000 salvage value. Management estimates the machine will produce 60,000 units of product during its life. Actual production of units is as follows: Year 1 Year 2 Year 3 Year 4 Year 5 13,050 12,500 12,000 11,550 10,900 Remember, you do not want to depreciate an asset so that the book value falls below salvage value. Required: Complete the following table by computing depreciation expense for each year and total depreciation expense for all years combined for the machine under each depreciation method. Year Straight-Line Units-of- Production Double-Declining-Balance Total