What is the ruling on working in the sale of shaving machines that may be used for permissible or impermissible purposes, and what is the ruling on selling perfumes labeled "denat alcohol"?

Selling shaving machines is permissible unless it is known that the buyer will use them for unlawful purposes, in which case selling them to him is impermissible. Treated alcohol, its ruling is the same as that of other types of intoxicating alcohol, and scholars have differed concerning the permissibility of selling perfumes mixed with it. Based on this, the mere presence of shaving machines or alcoholic perfumes in a stationery shop does not prevent working there.