As follows, according to the known relative price, find the demand and supply, and attach the answer. Can the great gods tell me something? Question 8.

When the wine demand is 140 and the supply is 20, it means that 120 of the wine is imported. At this time, according to the theory of mutual demand, a certain amount of cloth should be imported to offset the import value. Their price ratio is 4 1, which means that 1 unit of cloth is equivalent to 4 units of wine, so 30% of the cloth is exported. The demand for cloth is 160.