On October $1,2021,$ Marshwinds Wind Turbine Company places a new asset into service. The cost of the asset is $$8,000$ with an estimated $5-$year life and $$2,000$ residual value at the end of its useful life. What is the depreciation expense for $2021$ if Marshwinds Wind Turbine Company uses the straight$-$line method of depreciation?

Select one:

A$.$

$$400$

B$.$

$$300$

C$.$

$$800$

D$.$

$$1,600$