Custom Closets purchased office fixtures on January 1. The cost was $20,000, and the fixtures had a residual value of $5,000. The fixtures were given a useful life of 8 years. After the end of three years, it was determined that the fixtures would be obsolete in 2 more years and their residual value would still be $5,000. What will be the depreciation under the straight-line method to the nearest dollar be for the fourth year? O A. $1,875 ? B. $5,625 O C. $4,688 OD. $2,500