1. Nevelton Co. purchased mineral rights for $544,000,000. The mineral deposit is estimated at 475,000,000 tons. During the current year, 31,500,000 tons were mined and sold. a. Determine the depletion rate. b. Determine the amount of the depletion expense for the current year. C. Journalize the adjusting entry on December 31 to record the depletion expense. d. Why is depletion taken on mineral rights