Mather Company purchased equipment on January 1, 2016 at a total invoice cost of $560,000; additional costs of $10,000 for freight and $50,000 for installation were incurred. The equipment has an estimated residual value of $20,000 and an estimated useful life of five years. The amount of accumulated depreciation at December 31, 2017 if the straight-line method of depreciation is used is:

a.$124,000.

b.$240,000.

c.$220,000.

d.$216,000.