6. Felix Mining acquired a copper mine at a total cost of $3,000,000. The mine is expected to produce 6,000,000 tons of copper over its five-year useful life. During the first year of operations, 750,000 tons of copper was extracted. Depletion for the first year should be: A) $600,000 B) $375,000 C) $1,500,000 D) None of the above