Canliss Mining uses the retirement method to determine depreciation on its office equipment. During 2009, its first year of operations, office equipment was purchased at a cost of $14,000. Useful life of the equipment averages 4 years and no salvage value is anticipated. In 2011, equipment costing $5,000 was sold for $600 and replaced with new equipment costing $6,000. Canliss would record 2011 depreciation of:

a) $3,500.

b) $4,400.

c) $5,400.

d) None of the above.