Crops were also grown. with shells, cocoa beans and precious stones used as money. Traded ltems included fish, squash, potatoes, corn, honey beans, fruits and raw materials such as limestone, marble, jade, wood, copper and gold. The pp/oms, the merchants, used the many waterways to carry goods throughout the city-states. The lvlaya depended on a skilled and semi-skilled artisan midole class which produced jewellery, carvings, toys. weapons, paper, books and furniture.