In this anime scene, Joseph teachers viewers how to haggle for sandwiches in a market. While shop owners may try to start with a high price for foreigners (perhaps as a price discrimination technique), requesting lower prices may help identify the sellers’ willingness to accept. The benefit of trade and exchange is a mutual coincidence of wants. The two are able to find an acceptable trade, and thinks to the storyline, we can even calculate consumer and producer surplus!
Thanks to Lynne Tierney and Edison High School for submitting this! Lynne shared that a student in her class shared this video after going through a negotiation simulation.