Slipshod Company acquired a machine on July 1, 20x1, with invoice price of P840,000. Freight costs and installation costs amounted to P35,000 and P45,000, respectively. The estimated useful life of the machine is eight years and 180,000 production units, with residual value of P20,000. The production for 201 and 202 is 5,000 and 20,000 units, respectively. How much is the depreciation expense for the year 20x2, using the sum of the year's digits method