A grocery store sells 4 different jars of peanut butter. Determine which is the best buy, based on the cost per unit. 15 oz for 1.64, 26 oz for 2.68, 22 oz for 55, 38 oz for 3.46
To determine the cost per unit, we divide the total cost by the number of ounces in each jar:
Cost per ounce for the first jar: 1.64/15 = $0.109 per ounce
Cost per ounce for the second jar: 2.68/26 = $0.103 per ounce
Cost per ounce for the third jar: 55/22 = $2.50 per ounce
Cost per ounce for the fourth jar: 3.46/38 = $0.091 per ounce
The best buy, based on the cost per unit, is the fourth jar, which costs $0.091 per ounce.