Trade

I must say that whoever first thought of trading was very smart. It is a way to get rid of something you don't want or need to get something you do want or need. Throughout the years trading has changed but I can assure you we do still trade. Now days we trade a little different. We get something we want but we have to give up something we need as well, money. This affects me because I go out all the time and get something I want or need and give up my money for it.  

http://en.wikipedia.org/wiki/Trade