Bob Co purchased a building for $50,000 and began depreciating assuming a salvage value of $5,000 and useful life of 20 years.

After 5 years, it was determined that the salvage value would be $10,000, but the useful life would only be for an additional 10 years.

Calculate the depreciation, assuming straight line, for Year 1 and Year 6 of the building, and prepare the necessary journals.