i have 6 different zones (all within the same country) that i want to have different shipping costs for.

basically, it is for a flower shop that can only deliver within certain areas. i have set 'zones' up that reflect these areas, so when somebody signs up they select one of the zones.

but now i want to assign shipping rates to each one so when somebody comes to the checkout, zencart automatically knows (from when they signed up) which shipping rate to charge.

i have no idea how to do this or whether its possible?