Jefferson Company purchased a piece of equipment on January 1, 2014. The equipment cost $60,000 and has an estimated life of 8 years and a salvage value of $8,000. What was the depreciation expense for the asset for 2015 under the double-declining-balance method?

(a) $6,500.

(b) $11,250.

(c) $15,000.

(d) $6,562.