The United States Postal Service’s “Priority Mail Cubic” product isn’t top of mind among those engaged in a broad-based discussion of the agency’s parcel shipping portfolio. The product is only available to the Postal Service’s Commercial Plus users who have tendered 50,000 or more Priority Mail shipments during the prior calendar year. It is one of four Priority Mail subproducts. Besides the volume requirements, eligibility depends on a shipper achieving the right mix of parcel configuration....
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