Molly's Mobile Pet Grooming Service recently purchased a cargo van for $24,400. For depreciation purposes, the van is expected to to have a useful life of 140,000 miles and have a trade-in value of $3000. Molly uses the units-of-production method to calculate depreciation. What is the depreciation per mile? Round to the nearest tenth of a cent when necessary. $Incorrect Molly drives her van 35,000 miles in the first year. What is the book value of the van at the end of the first year? $Correct What is the annual depreciation in a year when the van is driven 49,000 miles?