Rye Co. purchased a machine with a five year estimated useful life and an estimated 10% salvage value for $100,000 on January 1, 2017. In its income statement, what would Rye report as the depreciation expense for 2018 using the double-declining-balance method? Select one: O a. $9,000 O b. $21,600 O c. $24,000 O d. $20,000 O e. $40,000