Bonita Company purchased machinery on January 1,2017,for $84,000. The machinery is estimated to have a salvage value of $8,400 after a usefu lf of 8 years Bonita Company purchased machinery on January 1,2017,for $84,000. The machinery is estimated to have a salvage value of $8,400 after a useful life of 8 years. Compute 2017 depreciation expense using the straight-line method. Depreciation expense $ Compute 2017 depreciation expense using the straight-line method assuming the machinery was purchased on September 1,2017 Depreciation expense $