The furnace used in a cogeneration plant is capable of burning coal, oil, or gas simultaneously. Taking efficiency into consideration, total input rate of 4000 kW equivalent of fuel must be burnt. Regulations require that the sulfur content of the emissions is limited to 2.5 percent. The heating capcities, emission values and the costs are given below
Determine the minimum cost per hour and the corresponding fuel burning rates in thousands of kg per hour for the problem.
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