Your company purchased a heating system on January 2 for $580,000. The system had an estimated salvage value of $25,000 and a useful life of 15 years. On January 3 of the ninth year, the company completed a renovation of the system at a cost of $33,000 and now expects the system to be more efficient and last 6 years beyond the original estimate. Salvage value estimate after that change is $10,000. The company uses the straight-line method of depreciation. What is the depreciation for the thirteenth year