Stevenson Corporation acquires a one-year-old building at a cost of $500,000 on January 1, 2018. The building has an estimated useful life of 50 years. However, based on reliable historical data, the company believes carpeting will need to be replaced in 5 years, the roof will need to be replaced in 15 years, and the HVAC system will need to be replaced in 10 years. On the date of acquisition, the cost to replace these items would have been carpeting, $10,000; roof, $15,000; HVAC system, $30,000. Assume no residual value. 21. Required: Determine amount to be recognized as depreciation expense on December 31, 2018, related to this building