In the great majority of instances the product is not distributed in kind. The wheat produced on a given farm is not directly apportioned among the farmers, labourers, and landowners that have co-operated in its production; nor are the shoes turned out by a given factory divided among the co-operating labourers and capitalists; and it is obvious that personal services cannot be returned to the persons that have rendered them. Cases of partial direct distribution do, indeed, occur; as when the tenant takes two-thirds and the landowner one-third of the crop raised by the former on land belonging to the latter; or when the miller receives his compensation in a part of the flour that he grinds. To-day, however, such instances are relatively insignificant. By far the greater part of the material product is sold by the undertaker or business man, and the price is then divided between himself and the other agents of production. All personal services are sold, and the price is obtained by the performers thereof. The farmer sells his wheat, the miller his flour, and the barber his services. With the money received for his part in production each productive agent obtains possession of such kinds and amounts of the national product as his desires dictate and his income will procure. Hence the distribution of the product is effected through the conversion of producers' claims into money, and the exchange of the latter for specific quantities and qualities of the product. While the national product as a whole is divided among the four productive classes, not every portion of it is distributed among actually distinct representatives of these classes. When more than one factor of production is owned by the same person, the product will obviously not go to four different classes of persons. For example; the crop raised by a man on his own unmortgaged land, with his own instruments, and without any hired assistance; and the products of the small shopkeeper, tailor, and barber who are similarly self sufficient and independent,--are in each case obtained by one person, and do not undergo any actual distribution. Even in these instances, however, there occurs what may be called _virtual_ distribution, inasmuch as the single agent owns more than one factor, and performs more than one productive function. And the problem of distributive justice in such cases is to determine whether all these productive functions are properly rewarded through the total amount which the individual has received. Where the factors are owned by distinct persons, or groups of persons, the problem is to determine whether each group is properly remunerated for the single function that it has performed.