A plant is using 4 tons/day of coal to generate steam. The calorific value of the coal is 4000 kcal/kg. The cost of coal is Rs. 2000/tone. The plant substitute coal with rice husks, as a boiler fuel, which has a calorific value of 3000 kcal/kg and cost Rs. 700/tone. Calculate the annual cost savings at 300 days of operation, assuming the boiler efficiency decreases from 78% on coal to 72% on rice husks.
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