Office Depot, Inc. is one of the largest suppliers of office products in the United States. Suppose it had net income of $738.7 million and sales of $25,000 million in 2018. Its total assets were $13,073.1 million at the beginning of the year and $13,717.3 million at the end of the year. What is Office Depot, Inc.'s (a) asset turnover and (b) profit margin?