in 2016, western maryland company paid $3,000,000 for a mining tract with reserves of 100,000 tons of ore, which the company planned to mine over a 20-year period. the company spent $500,000 developing the mine. western plans to spend $200,000 for reclamation when mining has been completed, after which the land will have an estimated value of $600,000. in 2016, western mined and sold 8,000 tons of ore. what depletion should western record for the year?