how to change trading strategy port royal 3

Just looking for a bit helper from the "peanut gallery." I finished improving the Dealer Campaign yesterday, but unbroken on playing to continue improving my undersized empire.

I currently have warehouses in Caiman, Port Royale, Port Astronomical Unit Prince, danamp; Santiago. I am attempting to set out up some sort of route, and I intellection I had it, but the game keeps informative me certain towns are outer of resources, of inter-trading between what town A makes and hand down it to town B.

Essentially, I desire my convoy to take the metal made in Port wine Royale danamp; drop it cancelled in Caiman to help with product in my Blacksmith. I want to learn the lettuce made in Cayman and dropped polish off in Port Royale to help in devising Unusual. I want the cotton successful in Port Royale to be dropped forth in Port AU Prince to avail w/ making textiles. And lastly, I want the timber made in Capital of Chile to be dropped off in Port Royale danamp; Caiman to help in yield.

Any tips? Preferrably, a walkthrough, but i'm not going to be picky.