A system for managing prescription data is provided. The system includes a switch system receiving prescription data from a pharmacy, such as medicine identification data, dosage data, number of doses data, fill date data, and number of refills data. A data volume sales system generates volume sales data from the prescription data, such as the percentage of a given type of medicine sold for a manufacturer relative to all manufacturers for that medicine. A data volume rebate by unit system receives the prescription data and, the volume sales data and generates incentive target reward data, such as the number of additional units of medicine that must be sold to reach a predetermined sales volume associated with a rebate level.