Marmoset Corporation purchased factory equipment that was installed and put into service on January 2, 2017, at a total cost of $110,000. Residual value was estimated at $6,000. The equipment is being depreciated over four years using the double declining-balance method. For the calendar year 2018, Marmoset should record depreciation expense on this equipment of: 

a) $55,000. 

b) $48,000. 

c) $21,000. 

d) $27,500.