Is the owner of a supermarket held accountable if he sells an item to a man who owns a women's beauty salon and relies on it for his income?

The income of a hairdresser is not entirely forbidden. Some of it is permissible, such as the wife of the owner handling permissible matters, while some of it is forbidden, such as the owner styling women's hair. The money from the shop is mixed, and dealing with mixed money is permissible. Therefore, there is no objection for the supermarket owner to sell to him and deal with him.