The price of a Priority Mail flat rate envelope (size 12-1/2″ x 9-1/ ... x 9-1/2″) will jump from $32 to $33.24. To see a ...
In essence, there is only one main difference between flat rate and Priority Mail: the price. All of your shipments are shipped in Flat Rate Boxes. Shipping with Flat Rate Boxes is a breeze. As long ...
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