A machinery was purchased by ABC Inc. on January 1, 2016. The asset was acquired for a total cost of P1,000,000. The estimated useful life of the machinery is 5 years. The machinery is intended to be used for the production of inventory. It is expected that the machinery will produce a total of 100,000 units of inventory before it is depreciated to its salvage value of P50,000. The pattern of production is 30,000 units in the 1st year; 25,000 in the 2nd year; 20,000 in the 3rd year; 15,000 in the 4th year; and 10,000 in the 5th year. The company's fiscal year ends on December 31. Compute for the annual depreciation expense throughout the machine's life using the different methods. Suppose the machinery was depreciated using the straight-line method. On the third year, a cost of P100,000 was incurred to increase the productivity of the asset and extend its useful life by an additional 1 year. On the fourth year, P20,000 was incurred was made to repair a damaged gear inside the machinery. Compute for the carrying amount of the machinery at the end of the fourth year