Which of the following three actions would not be used by the Fed to influence interest rates?

Lucy is a young entrepreneur who sells lemonade from her lemonade stand in her driveway on Saturday afternoons. During the first hour, Lucy sells 30 glasses of lemonade and incurs an average variable cost of $0.20. Lucy's _________ for the first hour are __________

Fill in the blank(s) with the appropriate word(s).

The nominal exchange rate is about 2 Aruban florin per dollar. If a basket of goods in the United States costs $40, how many florins must a basket of goods in Aruba cost for purchasing-power parity to hold?

a. 20 florin b. 40 florin c. 60 florin d. 80 florin