potatoes are on sale at both grocery mart in Baldwin hills market at grocery mart a 5 lb bag of potatoes cost $2.85 and at Baldwin hills market a 7 lb bag of potatoes cost $4.20 which store offers the...

potatoes are on sale at both grocery mart in Baldwin hills market at grocery mart a 5 lb bag of potatoes cost $2.85 and at Baldwin hills market a 7 lb bag of potatoes cost $4.20 which store offers the best deal on potatoes how do you know how much better is the deal