Answer:
Goods were traded for goods.
Step-by-step explanation:
During the Crusades trade became an important component because the Crusaders had long travels and with them they exchanged goods and ideas, for example, at that time, arabs were able to teach advanced mathematics and the numeral system, also medical principles.
The Crusaders were able to trade many kinds of food that were not available in Europe, such as sherbet, coffee, fruits and rice.
House items were also traded like mirrors, textiles, carpets, sailing compasses.