一个农民种植了1蒲式耳小麦，并以1美元的价格卖给磨坊主。磨坊主把小麦磨成面粉。然后以3美元的价格卖给面包师

。面包师用面粉制造面包，并以6美元的价格卖给一个工程师。工程师吃了面包。每个人的增加值是多少？GDP是多少？

A farmer grows a bushel of wheat and sells it to a miller for ＄1.00. The miller turns the wheat into flour and then sells the flour to a baker for ＄3.00. The baker uses the flour to make bread and sells the bread to an engineer for ＄6.00. The engineer eats the bread. What is the value added by each person？ What is GDP？