Su Yuanyuan felt quite embarrassed. She proactively added some sweet potatoes.
"We have a cellar at home, just give me the sweet potatoes, thank you, little girl."
"Comrade, do you have any goldfish?" This became an obsession for Su Yuanyuan.
"I do, wait a moment, I'll bring them out for you to check the quality."
Su Yuanyuan noticed that the quality they brought out was better than usual.
"Comrade, what's the price for these goldfish?"
"Ten yuan per tael."
"Alright, how much can you give me?"
"How much is your wheat per jin?"
"Thirty-five cents."
"Then let's trade, however much wheat you give me, I'll exchange for goldfish."
"Can you take four thousand jin?"
"Sure, no problem, four thousand jin will be fourteen hundred yuan, which is one hundred forty taels."
"Do you exchange pork at two yuan fifty per jin?"
"I want pork fat."
"Two yuan fifty per jin, I'll give you a hundred jin of lard." Lard has the highest oil yield.
