On January 1, Year 1, Ballard company purchased a machine for $48,000. On January 1, Year 2, the company spent $17,000 to improve its quality. The machine had a $10,800 salvage value and a 6-year life, which are unchanged. Ballard uses the straight-line method. What is the book value of the machine on December 31, Year 4? Multiple Choice $18,600 $30,000 $19.200 $9,500