6. The building account of Susan Company includes the following items on December 31, 2017: Building 225,00 17,50 Contract Price 0 Gain on sale of old building 0 Options 7,000 Repair and maintenance 12,000 The building was acquired in early 2017 and all entries have been made since the acquisition. The options include P5,000 on the building acquired and P2,000 on a building which was not acquired. Repair and maintenance costs relate to routine activities occurring after the building was occupied. a. Determine the cost of the building after adjustment. b. Determine depreciation expense for 2017 using each of the following methods, assuming a 20-year life and P80,000 salvage value. Half-year depreciation is taken in the year of acquisition and the year of disposal. i. Straight line ii. Sum-of-the-year's-digits ifi. Double declining balance