Movers like Arpin RI must file their rates for all moving services with the Federal Government. These rates are called a tariff. Using one formal tariff guarantees that every customer is quoted using the same pricing structure and no person or group can be discriminated against. Movers do have the ability to offer discounts off their pricing based on market factors such as the season, loyalty, or association with a group. Under this tariff, Arpin. RI can only discount the bottom line using a gross flat rate percentage. The bottom line is the sum of all transportation and auxiliary charges (excluding valuation).