It is a legacy technical architecture issue. The intelligence for working out the OOD price is embedded in the POS terminal. And there are only a few of them in a store. The pricing and promotion logic resides locally and of course, a POS terminal can process only one transaction at a time. If such intelligence were accessible as a service to the customer’s mobile app or the store associate’s app, things would be much better. Fewer store visitors would abandon the cart, average order values would be higher, and the customer experience would be much better.