28. Young Energy operates a power plant that includes a coal-fired boiler to produce steam to drive a gen- erator. The company can purchase different types of coals and blend them to meet the requirements for burning in the boiler. The following table shows the characteristics of the different types of coals: Type BTU/Ib % Ash % Moisture Cost ($/lb) 10% $2.49 13% 000D 11,500 11,800 12,200 10% 8% $3.04 12% 8% $2.99