Business Roundtable, an association of chief executive officers of leading U.S. companies, released a report demonstrating how small and large businesses work together to help each other and to strengthen the U.S. economy. The study found that, on average, each large U.S. corporation purchases more than $3 billion worth of goods and services from American small businesses. Collectively, these large firms generate an estimated $1.5 trillion in sales for small businesses annually.