In connection with the introduction of the next "Sunday trading ban", the shopping habits of Poles are also changing. The majority of purchasing behavior has shifted to Fridays and Saturdays. This effect was strengthened by discounters’ advertising campaigns, offering attractive Saturday offers, by means of which they managed to partially cover the sales losses from the lack of Sunday trading. However, this situation also generatesa problem in the form of frequent shortages of goods on the shelves, which has given rise to the continuing search for tradeoffs between delivery volumes and merchandise efficiency. In the film, you can see that 2 months ago Lidl lost sales due to OOS, so now part of the store is blocked by additional products waiting to be placed on the shelves. This is not an easy situation for either chains or shoppers.