TRADE

Producers obtain and make products to sell.

Transporters distribute the products to the shops.

Sales people sell the products or services to the consumers.

Consumers buy the finished product. 

Occupations:

http://www.educa2.madrid.org/binary/703/files867/

Types of trade:

http://www.primaria.librosvivos.net/archivosCMS/3/3/16/usuarios/103294/9/ud14_4EP_Science_tiposcomercio_1/frame_prim.swf 

Work and professions:

http://agrega2.red.es//repositorio/01022010/73/es_2009063062_7240134/index.html

Types of services:

http://www.primaria.librosvivos.net/archivosCMS/3/3/16/usuarios/103294/9/ud14_3EP_Science_Types_services_1/frame_prim.swf