Buff Company purchased a building for $900,000 cash on October 1, 2009. The estimated life is 20 years and the salvage value is estimated at $100,000. a.What is the depreciable cost? b.What is the annual depreciation expense under the straight-line method? c.Complete the following table using the straight-line method. Year Ended Depreciation Expense Accumulated Depreciation Net Book Value 12/31/2009 12/31/2010 d.What will be the book value of the equipment on 12/31/10