On January 1, 2013, Plover Ltd. purchased a machine for $330,000 and depreciated it using the straightline method with an estimated useful life of eight years with no residual value. On January 1, 2016, Plover determined that the machine had a useful life of only six years from the date of acquisition, but will have a residual value of $30,000. An accounting change was made in 2016 to reflect these additional facts. At December 31, 2017, the accumulated depreciation for this machine should have a balance of: a. $182,500. b. $187,500. c. $241,250. d. $250,000.