On any given day we know a salesman can earn $0 with a 40% probability, $100 with a 20% probability or $300 with 40% probability. His expected earnings equal

Spreads in quotations of exchange rates are:

a. the geographical dispersion of nations that use the currency. b. a measure of contagion involved in changes in exchange rates. c. the difference in the price the buyer pays versus the price the seller receives. d. he percentage of interest one pays when borrowing to purchase currencies.

In 2009 in the United States, net domestic product at factor cost was $11,091 billion. Additionally, rent was $2,000 billion, profits were $1,000 billion, and interest was $358 billion. Hence wages were

A) $7,733 billion. B) $9,091 billion. C) $10,091 billion. D) $8,091 billion. E) $12,091 billion.