At CVS, twelve large bottles of water cost $9.00. At Duane Reade, eighteen large water bottles cost $14.40. If I need to buy 24 water bottles for my class for our field study, which one is a better buy and by how much?

At CVS twelve large bottles of water cost 900 At Duane Reade eighteen large water bottles cost 1440 If I need to buy 24 water bottles for my class for our field class=