Shipping cost to different states within a country

Hello, I am new to the ZentCart, I am using PHP Version 5.3.5. I already included some of my products and I was working on the shipping module. I notice there are 3 zones. I am going to use the zentcart in a country where there are 29 states. I was able to break them in 3 zones, to make things easier. For example. I set up the country US and includen on that country 29 zones. I dividen those 29 zones in the eastern part which I consider zone 1, then the central part to be zone 2 and the western part to be zone 3. I input all the cost for those 3 different zones by weight. And now when I want to do an estimate shipping cost to zone 3. It will always use zone 1. For example on the zone 1 I put on the field: "US, FL, MI,....." and on my third zone I put in: "US, CA, TX,..." it seems that it will take always the first zone.

Could someone please help.

Regards,

From your post you seem to have US in each??

You need to create the 3 zones such as eastern, central, west wit only the states in those zonesIn the ship module you specifiy the zone(s)

Thank you Kobra for responding to my post. Here is the actual thing. Lets say that I customer from California wants to purchase something from me. On his account he has a California address and on my zonning California is on Zone 3. So when the shipping estimate calcualtes the cost, it will always go to zone 1 because all my states belown to the US Contry. If I don't include US on my zones, the shipping estimator will say that shipping is not available to that zone. Plus on the information that my customer fills out, I would preffer not to ask him if he is in the west, east or central part of the country, only the country he is in.

I do not know if this could be possible. Please advice.

it will always go to zone 1 because all my states belown to the US Contry
That is what you need to change and create custom zones that have a selection of states
States in this case are similar to countrys in the tutorial

https://www.zen-cart.com/tutorials/index.php?article=69

Thank you so much Kobra, I will start modifying my data.