On January 1, Bisbee Co. paid $80,000 for a new truck. It was estimated that the truck would drive 400,000 miles over the next 8 years, with a salvage value of $8,000 during that time. At the end of the first and second year, the odometer registered 45,000 and 97,000 miles, respectively. 

Calculate the book value of the truck using straight-line depreciation at the end of the second year.