Oriole Company purchased machinery on January 1, 2020, for $96,000. The machinery is estimated to have a salvage value of $9,600 after a useful life of 8 years.

Required:
a. Compute 2020 depreciation expense using the straight-line method.
b. Compute 2017 depreciation expense using the double-declining-balance method, assuming the machinery was purchased on October 1, 2017.