On July 1, 2014, Nowton Co. purchased machinery for $168,000. Salvage value was estimated to be $7,000. The machinery will be depreciated over ten years using the double-declining balance method. If depreciation is computed on the basis of the nearest full month, Nowton should record depreciation expense for 2015 on this machinery of

a. $26,880.

b. $28,980.

c. $30,240.

d. $30,590.