E3-1 Metro Company purchased machines. The selected depreciation method for each machine is summarized in the Table Machine Acquired Cost Salvage Value Useful Life in Depreciation Years Method 1/6/14 $20,000 $5,000 Straight-line 1/1/15 15,000 3,000 Declining balance 3 01/8/16 30,000 6,000 Units-of- activity For the declining balance method, the company uses the double-declining rate. For the units-of activity method, total machine hours are expected to be 2,000. Actual hours of use in the first year is: 320 hours. Instructions (a) Compute the amount of accumulated depreciation on each machine at December 31, 2016. (b) Prepare the entry records of 2016 depreciation