A coffee merchant sells two blends of coffee. Each pound of blend A contains 80% Mocha Java and 20 % Jamaican and sells for $2 a pound. Each pound of blend B contains 35% Mocha Java and 65% Jamaican and sells for $2.25 a pound. The merchant has available 1000 pounds of Mocha Java and 600 pounds of Jamaican. The merchant will try to sell the amount of each blend that maximizes her income. Let x be the number of pounds of blend A and y be the number of pounds of blend B. Since the merchant above has available 1000 pounds of Mocha Java, one inequality that must be satisfied is
A. 0.8x + 0.35y ? 1000.
B. 0.8x + 0.35y ? 1000.
C. 0.35x + 0.65y ? 1000.
D. 0.8x + 0.2y ? 1000.
E. none of these
Answer: B
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and the total profit function is given by 
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Find