Cuso Company purchased equipment on January 1, 2011, at a total invoice cost of $400,000. The equipment has an estimated salvage value of $10,000 and an estimated useful life of 5 years. What is the amount of accumulated depreciation at December 31, 2012, if the straight-line method of depreciation is used?

(a) $80,000.

(c) $78,000.

(b) $160,000.

(d) $156,000.