Depreciation Method) A machine was purchased on 1/1/09 for $80,000. Estimated residual value $10,000. Estimated life = 20 years. Required: What is the amount of depreciation expense for the second year of the asset's life 19. Under the Straight-line depreciation method. a. 4,000 b. 3,500 c. 8,000 20. Under the double-declining balance method. a. 8,000 b. 7,200 c.4.000