When Rolando purchased Driftwell for the first time, he compared the price to other sleeps aids like bedtime tea and melatonin supplements. Rolando was using [----] to help him make a purchase decision. When Rolando purchased Driftwell for the first time, he compared the price to other sleeps aids like bedtime tea and melatonin supplements. Rolando was using [----] to help him make a purchase decision. everyday low prices slotting prices reference prices substitute price points switching costs