Any agricultural or horticultural product grown or processed in connection with the farm operation, and items required for packaging or the use of such products, may be offered for sale. In addition, items such as fresh fruits, fresh vegetables, cider, honey, jams and jelly, pies and bread and cut evergreen trees grown and/or processed off site may be sold. All other retail activities such as the preparation of and sale of fast food, mechanized equipment and the sale of products associated with convenience stores are expressly prohibited. It is the intent of this regulation to provide farmers with an outlet to sell their agricultural or horticultural products and to make those farm products accessible to the public.