Lemon Corporation purchased a truck at the beginning of 2018 for $108,500. The truck is estimated to have a salvage value of $8,500 and a useful work life of 200,000 miles. It was driven 10,000 miles in 2018 and 30,000 miles in 2019. What is the depreciation expense for 2019? Select one: a. $30,000 b. $20,000 c. $5,000 d. $15,000