One method for determining which of two packages is the better buy is to compute the price per unit of both packages. For example, each ounce of flour in the large package costs 299 cents 80 = 3.74 cents. 80 ounces for $2.9932 ounces for $2.67 a. What is the cost per ounce to the nearest hundredth of a cent for the small package? cents per ounce b. Which is the better buy? package c. If the large package provides enough flour for 30 batches of Drop Cookies, the smaller package will provide enough flour for how many batches? batches