A company purchased certain equipment on January 2, 2013, at a cost of $40,000. The estimated useful life of the equipment was 8 years, with no salvage value expected to be realized. Depreciation is based on the straight-line method, with a full year's depreciation taken in the year of acquisition (2013). On January 2, 2019 (after the equipment had been in use for 6 years), the company over- hauled the equipment at a cost of $14,000. This overhaul extended the life of the equipment by 2 years (from 8 years to 10 years). The depreciation expense (after accounting for the overhaul) to be charged against income during the year ending December 31, 2019, will be: A) $5,400 B) $6,000 C) $6,400 D) $7,500 E) $8,500