I would pay 40 cents for the apple but I would also have paid 45 cents each for yesterdays apple and todays on the average. Again, customers have to be trained to understand that like anything, pricing can fluctuate.Yesterday and tomorrow don't matter ... Today is the only day that counts.
Logic and fairness have nothing to do with anything.
Riddle me this ... yesterday you went to the store and bought an apple for 50 cents. Today you would like to buy another so you go back to the store. Today's price is 40 cents for that apple. How much would you pay for the apple?