11- The Piney Copper Company purchased an orebearing tract of land for $10.0M. The 57 geologist for Piney estimated the recoverable copper reserves to be 500,000 tons. G During the first year, 50,000 tons were mined and 40,000 tons were sold for $5.0M. Expenses (not including depletion allowances) were $3.0M. (a) What are the percentage depletion and the cost depletion allowances? (b) Copper mining and production are subject to high levels of regulation, including control of air and water quality as well as materials handling and disposal practices. What are the primary environmental risks, and how has regulation lessened those risks? What are the most significant health risks, and how have these been lessened