Fortune magazine ranked the following 10 corporations as being among the 500 largest United States–based firms according to sales volume for 2013:
a. Group A: McDonald’s, Visa, Amazon, Target, Coca-Cola
b. Group B: Berkshire Hathaway, General Electric, Valero, McKesson, Hewlett-Packard
Which group would you say had the larger total sales volume, A or B? By what percentage (10 percent, 50 percent, 100 percent)?