What type of price do pieces in a machinable USPS Marketing Mail mailing that are not eligible for AADC price must be paid at?

The appropriate price that must be paid for pieces in a machinable USPS Marketing Mail mailing that are not eligible for AADC pricing is termed the Mixed AADC Price. This pricing category is specifically designed for mail pieces that fall short of meeting the criteria required for Automated Area Distribution Center (AADC) pricing.

When mail pieces do not qualify for AADC pricing, they can still be classified under the Mixed AADC category if the total volume shipped consists of a combination of pieces: some may qualify for AADC pricing and others may not. Thus, this ensures that mailers pay a fair price based on the eligibility of their mailing components while still benefiting from bulk mailing rates.

In contrast, Flat Rate, Standard Rate, and Bulk Rate pricing are distinct categories that apply under different conditions or mailing requirements and do not specifically address pieces that are partially eligible for AADC pricing. Therefore, the Mixed AADC Price is the most precise option for this particular situation.