Able Towing Company purchased a tow truck for $60,000 on January 1, 2021. It was originally depreciated on a straightline basis over 10 years with a salvage value of $12,000. On December 31, 2023, before adjusting entries had been made, the company decided to change the remaining estimated life to 4 years (including 2023) and the salvage value to $2,000. What is the depreciation expense for 2023 ? $15,000. $6,000. $4,800. $12,100