Raw materials are goods receiving little or no processing before they are sold, except what is necessary for handling and shipping. Purchased primarily by processors and manufacturers, they are inputs for making other products. The two types of raw materials are natural products (fish, lumber, iron ore, and crude petroleum)and farm products (fruits, vegetables, grains, beef, cotton, and wool). Processors and manufacturers purchase nearly all natural products and about 80 per cent of all farm products. Retailers or consumers buy the remaining 20 per cent directly without any processing.