Store clerk: 3000 JPY pleas
What, you're giving me 10000 JPY!? Why?!
Customer: What, you don't know? I'll explain it. When paying at the cash register, when presented with a bill whose value is larger than the amount needed, the store side of the transaction needs to prepare the « difference » between that and the price of the merchandise I'm « Buying ». In technical jargon, this is called « change ».
Back then when the earliest forms of trading surfaced, humanity solely relied on « barter » to exchange goods. With « barter », an individual possessing any surplus of value, such as a measure of grain or a quantity of livestock could directly exchange that for something perceived to have similar or greater value or utility, such as a clay pot or a tool. The capacity to carry out barter transactions is limited in that it depends on a coincidence of wants.
Nowadays people use « money » to perform the act of « buying ». This system proved to have invaluable advantages over the old « barter », most notably in that it doesnt require a coincidence of wants and thus circumvents the incommodities that come with it, such as having to use an intermediate product when neither you nor your trade partner are interested in a direct swap. Another important advantage, one of high significance for this matter, is that it can always be divided freely; while goods like wheat already are freely apportionable, buying a single unit of merchandise can prove to be difficult if the goods youre trying to barter for said merchandise dont match the value of it. With « money » however trade partners should always be able to make their swap even in value, this system is called « change ».
Normal students usually only use 1000 JPY or 5000 JPY bills, so it's pretty normal for you to be surprised if I present you with a 10000 JPY bill all of a sudden.
Clerk: "I lost
"
Others: "He's a genius
", "Wonderful!"
Imouto: "NII-SAMA SUBARASHII~"
