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A coffee merchant has 400kg of Robusta coffee and 480kg of Arabica coffee. The coffee is packaged by weight as follows: Type I: 30% Robusta and 70% Arabica Type II: 50% Robusta and 50 % Arabica Type I is sold at sh.34
per kg while type II is sold at sh.36 per kg. Use graphical method to determine the number of kilograms of type I and type II which should be packaged to maximize the profit.