Equipment with a cost of $160,000, purchased on May 1, 2003, has an estimated residual value of $10,000 and an estimated life of 4 years. It is to be depreciated by the straight-line method. What is the amount of depreciation for the year 2003, during which the equipment was used 3,300 hours? Select one: a. $37,500 b. $25,000 c. $40,000 d. $26,667