I come back from this store and note once more tha...

I come back from this store and note once more that the price of the labels on the shelves does not correspond to the price paid at the checkout, and always in favor of the store.
Waste of time, 20 minutes waiting at the central cashier for 2.50, but it's for the principle, and I'm not the only customer, 2 others in front of me for the same problem.
Be careful to note the prices on the shelf and especially the promotions, not applied at checkout.