On January 1, 2018, the Allegheny Corporation purchased machinery for $150,000. The estimated service life of the machinery is 10 years and the estimated residual value is $18,000. The machine is expected to produce 240,000 units during its life.

Required: Calculate depreciation for 2018 and 2019 using each of the following methods.

1. Straight line. 2. Sum-of-the-years'-digits. 3. Double-declining balance. 4. One hundred fifty percent declining balance. 5. Units of production (units produced in 2018, 50,000; units produced in 2019, 45,000).