Say you’re in a supermarket doing your grocery run and you’re drawn to a bold red label advertising a sale on one of your favourite snacks. Maybe you were going to buy it anyway and get a kick out of the small saving. Perhaps it wasn’t on your shopping list at all but given the discount, you take a punt anyway. You even think about buying in bulk, to store in your pantry for the next time you’re entertaining. Coles was this week found to have misled shoppers with its discounts. Getty Either way, the snack ends up in your trolley. But then, you learn that instead of getting a deal, you’re paying what was a freshly hiked price. Would you buy the item anyway, or would you spend the time studying others on the shelf to find a cheaper alternative? Or would you think ‘why do I even need this?’ and keep shopping?…