4. A company purchases $100 million in marketable securities, sells $50 million of marketable securities, and then buys new machinery for $500 million. The Treasury team is assessing its Investing section of the cashflow statement and concludes it Investing section is: a. $600 million b. $550 million c. (\$550 million) d. (\$600 million) 7. One of the best measures of a company's profitability is calculated by which ratio: a. Operating profit margin b. Return on equity c. Net profit margin d. EBIT margin 3