Then, the sales representative puts this information into a computer program that develops a customized formula to meet the needs of the farmer’s herd. This customized formula is then produced at bulk load-out by a computer controlled continuous proportioning system by blending some, or all, of the following : pellets, meal, flaked corn, crimped oats, and liquid molasses. The farmer is able to specify the form of feed that he wants. The computer prints out a customized invoice for each particular formula, including the required tag information.