Zinc Corp. purchases a truck at the beginning of Year 1 at a cost of $16,500. The truck is estimated to have a useful life of 6 years and a trade-in value of $1,500. Assuming that Zinc Corp. uses the straight-line method of depreciation, the book value of the truck at the end of Year 1 is: a.$13,580. b.$12,000. c.$11,670. d.$14,000.