How can I set up
USPS Shipping to have options given only if a certain amount of items are being checked out?
USPS for shipping and I want it to use a small flat rate box if there are lets say 5 items in the
cart. Then, if there are more than 5 it would only give the option of
medium flat rate box. Then finally, more than 10 a large flat rate box. How could I set the
USPS shipping on magento to do this?
I'm on base