If the united states exports $100 worth of diamonds to the kingdom of mocha and imports $80 worth of bows and arrows it has a(n)

Trade surplus

Explanation:

In business when export is greater than import in monetary terms the situation is called trade surplus.  

Trade surplus is a favorable situation in economics. The economic condition of a country is assumed to be better when the country has a trade surplus. The opposite situation in which import is greater than export is called trade deficit.

answer; how many employees will be needed for jobs in the coming period;

answer; comparing the additional benefits and costs;