A Company purchased a tow truck for $450,000 on January 1, 2016. It was originally depreciated on a straight-line basis over 10 years with an assumed residual value of $90,000. On December 31, 2018, before adjusting entries had been made, the company decided to change the remaining estimated life to 4 years (including 2018) and the residual value to $15,000. What was the depreciation expense for 2018? Select one: 0 $90,750. $45,000 O $56,250. O $112,500