On March 31, 2009, M. Belotti purchased the right to remove gravel from an old rock quarry. The gravel is to be sold as roadbed for highway construction. The cost of the quarry rights was $164,000, with estimated salable rock of 20,000 tons. During 2009, Belotti loaded and sold 4,000 tons of rock and estimated that 16,000 tons remained at December 31, 2009. During 2010, Belotti loaded and sold 8,000 tons, but estimated at December 31, 2010, that 12,000 tons remained. $41,000. $32,800. $30,750. $24,600.