Equipment was purchased by Potter, Inc. on January 1, 2020 at a cost of $100,000. The equipment has an estimated salvage value of $10,000 and an estimated useful life of 6 years or 20,000 hours. The equipment is to be depreciated using the units-of-activity depreciation method. What is the amount of depreciation expense for the 2020 calendar year, if the equipment was used for 2,000 hours in 2020? $9.000 O $15,000 O $16,667 O $10,000