At Garcia's market a certain brand of cocoa is sold in boxes

At Garcia's market a certain brand of cocoa is sold in boxes of two sizes, A and B. For which size is the price per ounce of cocoa less?

(1) The weight of the coca in the size B box is 1 2/3 times that in the size A box.
(2) The price of a Size B box is 80 percent more than the price of Size A box.

Please provide detailed explanations