On April 17 of the current year, a mining company purchased the rights to a mine. The purchase price plus additional costs necessary to prepare the mine for extraction of minerals totaled $6,000,000. The company expects to extract 1,000,000 tons of minerals during a four-year period. During the current year, 250,000 tons were extracted and sold immediately. Required: 1. Calculate depletion for the current year. 2. Is depletion considered part of the product cost and included in the cost of inventorv