The assignment of students to different types of educational programs is considered to be called tracking - d. Tracking serves as a step which helps people to follow through a curriculum in their own pace and not in the pace that was predestined for everyone.
Producers want to charge prices that at least will return all their costs: the cost of production, compensation for the time they and their employees spend on the production, and the cost of material, but in an ideal case they want to charge more so that they can earn profits.
