Company: Amazon.com, Inc.

Amazon.com, Inc. achieved substantial growth in the year ending December 31, 2023. The company reported total revenue of $300 billion, with a cost of goods sold (COGS) of $180 billion and operating expenses of $70 billion. Net income stood at $35 billion. Based on these figures: 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 $250 billion.