Class rate making forms the basis of less-than-truckload (LTL) rate making. It involves grouping items into 18 classes based on their characteristics, with class 500 being the highest and class 50 being the lowest. The lower the class, the lower the price. Heavier shipments also receive lower costs per pound due to economies of scale. For example, if a 5,000 pound shipment at class 85 costs around $2,995.50 based on the published rate of $59.91 per hundredweight. However, large companies like XYZ would negotiate a fixed freight-all-kinds (FAK) class rather than use the published class rates, since carriers want to ensure continuous business from large shippers.