Landscaping Corporation purchased a truck at the beginning of 2012 for $90,000. The truck is estimated to have a salvage value of $3,600 and a useful life of 120,000 miles. The truck was driven 18,000 miles in 2012 and 32,000 miles in 2013. What is the depreciation expense for 2013 using the units of production/activity?

Multiple Choice

$13,500

$12,960

$21,600

$23,040

$36,000