Nelson Enterprises purchased equipment costing $100,000 on January 1, 2010. The equipment is expected to have a salvage value of $10,000 at the end of its five-year useful life. If the company uses the double-declining balance depreciation method, the book value of the equipment on December 31, 2012 will be:

		$40,000.
		$24,000.
		$21,600.
		$36,000.