Jayhawk Industries purchased a truck for $40,000 on January 1. The truck had an estimated useful life of 80,000 miles and an estimated residual value of $8,000. In the third year of ownership, the car was driven 20,000 miles. Using the units of production method, the amount of depreciation expense for year 3 was

$12,500.

$10,000.

$ 9,250.

$ 8,000.