An equipment at MNS systems costing exist600,000 was depreciated the double declining balance (DDB) method. In year four, the company decided switch to the straight-line depreciation method. Determine the depreciation charges in year 4. Assume a depreciable life of 10 years and a salvage value of exist100,000. A. exist40,000 B. exist36,667 C. exist50,000 D. exist32,000