Ordering of shipping services

Can I set the order that the shipping services appear during checkout?
I would like the service with the lowest price (USPS - First Class Mail in my case) to appear first in the list.
Currently it shows the order as:

USPS : Priority Mail $5.60
USPS : Express Mail $16.95
USPS : First Class Mail $2.68

But instead I would like it to show like this:

USPS : First Class Mail $2.68
USPS : Priority Mail $5.60
USPS : Express Mail $16.95

How can I set that order?
Thank you

Hi,

You would have to create several instances of the USPS shipping method, one per service, and select only one service per instance. Then, in the shipping methods listing page of the backend, you'll be able to order your USPS shipping method instances in the order you want.

That worked. Thank you for your help!