Equipment with a cost of $159,170 has an estimated residual value of $7,718 and an estimated life of 4 years or 12,824 hours. It is to be depreciated by the straight-line method. What is the amount of depreciation for the first full year, during which the equipment was used for 3,150 hours? a. $37,863.00 b. $37,201,64 c. $39,792.50 d. $37,249.72