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4. A machine costing P42,000 will have a life of 5 years and a salvage value of P3,000. It is estimated that P10,000 units will be produced with this machine, distributed in this manner: first year, 2000; second year, 2400; third year, 2100; fourth year, 1800; fifth year, 1700. If depreciation is allocated on the basis of production, calculate the depreciation charges. (20 points)