Ting Co. acquired a machine on January 2, 20x1 for P5,000,000. The machine has a useful life of 20 years and a residual value of P100,000. Ting Co. uses the double declining balance method of depreciation. In 20x8, a decision was made to change the depreciation method from the double declining balance to the sum-of-the-years digits method. The original estimate of useful life was unchanged; however, the machines residual value was changed to P200,000. The machine needs to be refurbished for a total cost of P20,000 before it can be sold at the estimated residual value of P200,000. How much is the depreciation in 20x8? A. 294,865 b. 302,336 c.315,925 d. 332,556