Kingbird Company purchased machinery on January 1, 2017 for $99200. The machinery is estimated to have a salvage value of $9,920 after a useful life of 8 years.

A. Compute the 2017 depreciation expense using double-declining balance method.

B. Compute 2017 depreciation expense using the double-declining-balance method, assuming the machinery was purchased on October 1, 2017.