Some have argued that the U.S. Postal Service should be allowed to raise prices in order to increase revenue and ensure that the sales of their products cover their costs. Others have argued that the current costing system may overstate the cost of some products, as it assumes the Postal Service is able to adjust its capacity, such as quickly closing a facility or eliminating a tour, to match the decline in mail volume.
The Postal Service has more than 10,000 prices contained in a 1,800-page customer manual known as the Domestic Mail Manual (DMM). The DMM provides individual and commercial mailers with information about postal services and standards for both domestic and international mailings. The Price List, also known as Notice 123, contains domestic and international retail and commercial prices for all postal products and services.