Exercise 11-15 Depletion [LO11-3] On April 17, 2018, the Loadstone Mining Company purchased the rights to a coal mine. The purchase price plus additional costs necessary to prepare the mine for extraction of the coal totaled $4,040,000. The company expects to extract 1,010,000 tons of coal during a four-year period. During 2018, 251,000 tons were extracted and sold immediately nts 1. Calculate depletion for 2018