USPS Display only the cheapest method

[kidd6801]

Using v1.3.9h with the latest updates to the USPS Module.
Fresh install http://w w w . t o m s t s . n e t/store

We only offer Priority Mail domestically so from the US everything is working great.

For overseas we offer:

Priority Mail International Medium Flat Rate Box
Priority Mail International Small Flat Rate Box

They both display the proper shipping amounts.

What I am trying to do is have it ONLY display the lowest possible shipping cost and not having it display the Medium Flat Rate Box when it is possible to fit their order in a Small Flat Rate Box.

I am thinking it is possible since the Small Flat Rate Box disappears after a certain weight.

Thanks in advance,
CyZ

[Ajeh]

The shipping for:
Priority Mail International Large Flat Rate Box - Max 20lbs
Priority Mail International Medium Flat Rate Box - Max 20lbs
Priority Mail International Small Flat Rate Box - Max 4lbs

The Small will always be cheaper than Medium and the Medium cheaper than Large ...

When the weight goes over 4lbs the Small will not show ...

When the weight goes over 20lbs the Medium and Large will not show ...