Workers in this unit group conduct businesses in wholesale and retail trade on their own behalf or in partnership. Their functions include: purchasing goods of the types, qualities and quantities required; selling goods to retailers, industrial, commercial or other establishments or to individual customers; acting as intermediaries between buyers and sellers of goods. Producer-vendors, such as bakers or butchers are coded as producers (Major Groups 7, 8, 9). Retailer and Wholesalers can be additionally coded by PRODUCT.