Platak, Inc., acquired a silver mine for $5,000,000. The company's survey estimates that 40,000 ounces of silver can be extracted from the mine over a period of 5 years. In the first year of operations, 15,000 ounces of silver were extracted. Should the units-of- production method be applied, Platak, Inc. would recognize: Select one: a. environmental expense of $1,000,000 b. depletion expense of $1,875,000 c. amortization expense of $1,875,000 d. depreciation expense of $1,500,000