A measurable quantity that is inherent in the problem is called a(n)

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Fill in the blank(s) with the appropriate word(s).

A coal mine cost $1,003,000 and is estimated to hold 50,000 tons of coal. There is no residual value. During the first year of operations, 6,000 tons are extracted and sold. Calculate depletion per unit. (Round your answer to the nearest cent.)

A) $10.03 B) $5.02 C) $20.06 D) $15.04