A store sells two types of coffee, Arabica and Robusta. On Monday, they sold 5 pounds of Arabica and 3 pounds of Robusta for a total of $70. On Tuesday, they sold 2 pounds of Arabica and 4 pounds of Robusta for a total of $56. What is the price per pound of Robusta coffee?

✓ Correct Answer: Option B

Let A be Arabica price, R be Robusta price. Equations: 5A + 3R = 70 and 2A + 4R = 56 (or A + 2R = 28). From A + 2R = 28, A = 28 - 2R. Substitute into the first equation: 5(28 - 2R) + 3R = 70 => 140 - 10R + 3R = 70 => 140 - 7R = 70 => 7R = 70 => R = 10.