Company: Bank of America Corporation

Bank of America Corporation disclosed its financials for the fiscal year ending December 31, 2023. The company reported total revenue of $200 billion, with a cost of goods sold (COGS) of $100 billion and operating expenses of $50 billion. Net income amounted to $30 billion. From this data: a) Calculate the gross profit margin. b) Determine the operating profit margin. c) Compute the net profit margin. d) Evaluate the return on assets (ROA) if the company's total assets amount to $500 billion.