1. Jalloh Company purchased machinery for $162,000 on January 1,
2017. It is estimated that the machinery will have a useful life of
20 years, salvage value of $15,000, production of 84,000 units, and
working hours of 42,000. During 2017, the company uses the
machinery for 14,300 hours, and the machinery produces 20,000
units. Compute depreciation under the straight-line, unit of
output, working hours, sum of the year’s digits, and
double-declining balance methods.