if the product is sold in substantially the same state it is in on completion of the exempt functions. Thus, in the case of an organization described in section 501(c)(3) and engaged in a program of rehabilitation of handicapped persons, income from sale of articles made by such persons as a part of their rehabilitation training would not be gross income from conduct of unrelated trade or business. The income in such case would be from sale of products, the production of which contributed importantly to the accomplishment of purposes for which exemption is granted the organization—namely, rehabilitation of the handicapped. On the other hand, if a product resulting from an exempt function is utilized or exploitedin further business endeavor beyond that reasonably appropriate or necessary for disposition in the state it is in upon completion of exempt functions, the gross income derived therefrom would be from conduct of unrelated trade or business. Thus, in the case of an experimental dairy herd maintained for scientific purposes by a research organization described in section 501(c)(3), income from sale of milk and cream produced in the ordinary course of operation of the project would not be gross income from conduct of unrelated trade or business. On the other hand, if the organization were to utilize the milk and cream in the further manufacture of food items such as ice cream, pastries, etc., the gross income from the sale of such products would be from the conduct of unrelated trade or business unless the manufacturing activities themselves contribute importantly to the accomplishment of an exempt purpose of the organization.