Trade(Science)
Description
You need to build a Trade Tent to trade. To sell goods, make a peasant a 
Trader and add orders to sell to the Trade Tent. If you need to buy goods, add buy orders to the Trade Tent. A caravan of goods arrives every day at noon, which will give you money for goods you want to sell and sell goods to you according to your orders. You can buy and sell goods with the trading tent to earn science points. Goods with higher prices grant more science points.