On January 2, 2016, Half, Inc., purchased a manufacturing machine for $864,000. The machine has an eight-year estimated life and a $144,000 estimated salvage value. Half expects to manufacture 1,800,000 units over the machine's life. During 2017, Half manufactured300,000 units.

Required:

For each item, calculate depreciation expense for 2017 (the second year of ownership) for the machine just described under each method listed below:

1. Straight-line

2. Double-declining balance

3. Sum-of-the-years' digits

4. Units-of-production