A company bought a new machine for $21,000 on January 1. The machine is expected to last eight years and to have a residual value of $3,500. If the company uses the double-diminishing-balance method, what is the accumulated depreciation at the end year two? (Round your answer to the nearest whole dollar.) O A. $13.440 B. $7 656 C. $9.188 D. $8.750