On April 1, 2019, Justin Company purchased a copper mine at a cost of $28,000,000. The mine was estimated to contain 1,000,000 tons of ore and to have a residual value of $8,000,000 after mining operations are completed. During the year, 250,000 tons of ore were removed from the mine. On December 31, 2019, the book value of the mine is: Select one: A. $14,000,000 B. $23,000,000 C. $17,500,000 D. $20,500,000