Unit price for the 3.47 pound bag is $0.26 per pound
Unit price for 5.15 pound bag $0.27 per pound
The best buy is $0.26
Step-by-step explanation:
Unit pice for the 3.47 pound bag = $3.47/13.46 = $0.26
Unit price for 5.15 pound bag = $5.15/18.75 = $0.27
Therefore, the best buy is the cheaper unit price = $0.26