Answer:
David buys 60 ounces of chocolate chips for the cookies. To calculate the cost of the chocolate chips, we need to know the cost per ounce. According to
, a 12-ounce bag of semi-sweet chocolate chips costs $2.79 at Target. Therefore, the cost per ounce is $2.79/12 = $0.2325 per ounce. Multiplying this by 60 ounces, we get the total cost of the chocolate chips as $13.95. Therefore, the chocolate chips cost $13.95 for David to make his cookies.