In the given question the most important part is convert ounce to pound and then the problem becomes easy. We already know 1 ounce = 0.0625 pounds Then 24 ounce = 0.0625 * 24 pounds = 1.5 pounds Now let us focus on the problem in hand and the information's that are already given in the question. The cost per pound of the sandwich sold by Deli = 6.40 Then The cost of 1.5 pound of sandwich sold by Deli = 6.40 * 1.5 = 9.60 So the cost of 24 ounces of spread is 9.60.