18. Sorenson Industries uses accrual accounting, and applies the units-of-activity method for depreciating its equipment. The business prepares financial statements every December 31. On January 1, 2022, Sorenson Industries purchased equipment for $126,000. The company expects to use the equipment 100,000 hours over its 12-year useful life. Salvage value is estimated to be $18,000. If the equipment is used 8,000 hours in 2022, how much depreciation expense should Sorenson record in 2022? a. $8,000. b. $10,080. c. $8,640. d. $9,333