accomodate cost create delivery flat handle help hours international mail packaging postage postal pounds pricing priority rate service shipping structure subscribed thank-you usa

I just subscribed to your service, thank you. I use US Postal Service, Priority Mail, Flat Rate Packaging for my
> shipping. For USA delivery up to 3 pounds, my cost is $5.25, More than 3 pounds is $9.60. Flat Rate international is $11.00 for up to 3 pounds, more than 3 pounds is $22.00.

I worked at it for a couple hours and I cannot figure out how to create a postage pricing structure to accomodate the above. Can you help me?

Unfortunately E-junkie can not handle that kind of a shipping cost structure.