On January 2, 2011, the Crossover Band acquires sound equipment for concert performances at a cost of $55,900. The band estimates it will use this equipment for four years, during which time it anticipates performing about 120 concerts. It estimates that after four years it can sell the equipment for $1,900. During year 2011, the band performs 40 concerts. Assume that the Crossover Band uses straight-line depreciation but realizes at the start of the second year that due to concert bookings beyond expectations, this equipment will last only a total of three years. The salvage value remains unchanged book value at point of revision remaining depreciable cost depreciation per year for years 2 and 3