"Hem, I am not so sure boy. But I think sometimes it easier to buy it with money instead of exchanging them. Because the value will be easier to be determined." The middle-aged man started eating his bacon pie.
"Like this pie. I don't actually know, how many pizza should I give in exchange."
The boy looked at his own plate, "Yeah, me neither, I guess. If I pay it with yogurt. How may jars should I give?"
"That's why, since human needs are getting more and more, determining a value of things to another things is getting more difficult." The middle-aged man chomped another bite of the pie.
"Then, How many sugar will you give me in exchange to the tomatoes, pizza owner?" The young boy started eating his toast.
"Well, maybe this is the advantage of money. Let's see," The middle-aged man pointed his fork on his chin, tapped it for several times while thinking, "With that kind of quality and quantity, it will be around 25 pennies. Then I'll give you the sugar as much as the same cost. Fair isn't it?" He pointed his fork to the boy.
"Hmm..., maybe..." The boy sounded unsure. "But, then.., how do people determine the value of things and convert it into price?"
In the end, the day wasn't over yet.
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