Danford Trucking purchased a tractor trailer for $147,000. Danford uses the units-of-activity method for depreciating its trucks and expects to drive the truck 1,000,000 miles over its 12-year useful life. Salvage value is estimated to be $21,000. If the truck is driven 90,000 miles in its first year, how much depreciation expense should Danford record? $11,340. $13,230. $12,250. $10,500