Distinguish among the terms of trade and the balance of trade for a country.

Definition of terms of trade

a) The amount of a given amount of export goods essential to buy a given amount of import goods

b) Barter or commodity terms of trade, i.e. quantity of Volvos per quantity of Toyotas

Explanation of trade balance

a) Price of exports times quantity of exports equals export revenue

b) Price of imports times quantity of imports equals imports spending