Company: Pfizer Inc.

Pfizer Inc. released its financials for the fiscal year ending December 31, 2023. The company reported total revenue of $80 billion, with a cost of goods sold (COGS) of $30 billion and operating expenses of $25 billion. Net income stood at $15 billion. Given this information: a) Calculate the gross profit margin. b) Determine the operating profit margin. c) Compute the net profit margin. d) Analyze the return on investment (ROI) if the company's total investment is $200 billion.