A salted fishapos;s

The old man said, "It depends on how many houses you want to build. Six houses would cost about 40,000, three houses around 20,000. How many houses are you planning to build","Charcoal is even more expensive, three coins per hundred jin. In winter, it costs three and a half coins.",At ten o'clock in the morning, Yan Lao Er and Qi Si came back.。