Flip Company purchased equipment on July 1, 2011 for $90,000. It is estimated that the equipment will have a $5,000 salvage value at the end of its 5-year useful life. It is also estimated that the equipment will produce 100,000 units over its 5-year life.
If the company uses the double-declining-balance method of depreciation, what is the balance of the Accumulated Depreciation-Equipment account at December 31, 2013?