Mather Company purchased equipment on January 1, 2018 at a total invoice cost of $336,000; additional costs of $6,000 for freight and $30,000 for installation were incurred. The equipment has an estimated salvage value of $12,000 and an estimated useful life of five years. The amount of accumulated depreciation at December 31, 2019 if the straight-line method of depreciation is used is:

$148,800.

$129,600.

$144,000.

$132,000.