Machine Salvage Useful Life Depreciation Acquired CostValue (in years) Method 2 3 Apr. 1, 2013 Sept. 1, 2013 July 1, 2012 $68,000 $5,000 6,000 84,000 4,000 7 4 8 Straight-line Declining-balance Units-of-activity 64,000 For the declining-balance method, Howard Company uses the double-declining rate. For the units-of-activity Actual hours of use in the first 3 years were: 201 7,000. method, total machine hours are expected to be 40,000. 1,200; 2014, 6,400; and 2015, Instructions (a) Compute the (a amount of accumulated depreciation on each bus at December 31, 2015