On January 1, 2019, a machine has a remaining book value of $6,300. The residual value of the machine is $1,200. The company uses the double-declining - balance method of depreciation. If 2019 is the last year for depreciation, what is Depreciation Expense for the year ending December 31, 2019? OA. 50 OB. 55100 OC. $1,200 OD. 56,300