How can a supermarket owner convince customers that he does not sell prayer times?

A Muslim can strengthen his argument for closing his shop at prayer times by citing what has been mentioned in praise of those who are diligent in prayer in the mosque, such as the words of Allah Almighty: "Men whom neither commerce nor sale distracts from the remembrance of Allah and performance of prayer and giving of zakah. They fear a Day in which hearts and eyes will [fearfully] turn about," and the Ahadith that emphasize the virtue and obligation of praying in the mosque, such as: "Prayer in congregation is twenty-seven times superior to prayer performed individually," and "Whoever hears the call [to prayer] and does not come, there is no prayer for him except for an excuse," and "There is no prayer for the neighbor of the mosque except in the mosque." He can also place a sign clarifying the reason for closing the shop at prayer times.