On September 19, 2010, McCoy Co. purchased machinery for $190,000. Salvage value was estimated to be $10,000. The machinery will be depreciated over eight years using the sum-of-the-years'-digits method. If depreciation is computed on the basis of the nearest full month, McCoy should record depreciation expense for 2011 on this machinery of:

a. $40,903.

b. $38,845.

c. $38,750.

d. $35,000.

It says the answer is C but I am confused on how to get there. If you could show how you get the answer step by step, that would be helpful.