Ujamaa Jam A

As you roam across the vast desert, you came upon a city with large walls.  As you approach the center of the market, you realize that what you thought was a bustling city, was actually a small town that is just starting to expand. With your help, they just might be able to grow and keep up with the larger cities. 

Each merchant in the square has goods they need to send and receive from other merchants, but they are unable to move. It is up to you to initiate the trades and help them  "level up". As they level up, they are able to gather up larger amounts of resources. Help them reach the maximum level.