A salted fishapos;s

"You went the wrong way. Go to the quarry first and see how much scrap they'll sell you for. Then come back here and order bricks from me. If they can give you more there, you'll save a lot of money on bricks." The old man said honestly.,Then he told Yan Lao Er, "I'll calculate half the amount for you first. When you return from the quarry, tell me the exact number.",He was going to the quarry to see if they also used copper coins for transactions. If so, he would take his silver and exchange it for copper coins first, then use the copper coins to pay, making a profit on the difference.。