On January 1, 2002, Duncan Inc. purchased equipment for $65,000. The equipment had an estimated life of 10 years, an estimated salvage value of $5,000, and was expected to be used to produce 150,000 units over its life. During 2002, the equipment was used to produce 9,000 units and during 2003 it was used to produce 17,000 units. Assume the company employs the units of production method of depreciation. Calculate the amount of accumulated depreciation on the equipment shown in the company's December 31, 2003 balance sheet. Do not use decimals in your answer.