Rules for Peddling in Another World is a Manga/Manhwa/Manhua in english language, Adventure series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

If you accidentally crossed over into another world, what kinds of abilities would you need to reach your peak in life? Would you became an Enchanter? A Hero? Or maybe a Cultivator of Immortal Techniques? Of course not. You would take advantage of your present day knowledge in this other world to do business and earn big bucks!