Company: Tesla, Inc.

Tesla, Inc. had a remarkable financial year ending December 31, 2023. With total revenue reaching $100 billion, the company's cost of goods sold (COGS) amounted to $60 billion, while operating expenses stood at $25 billion. Net income for the year amounted to $15 billion. Given this information: a) Calculate the gross profit margin. b) Determine the operating profit margin. c) Compute the net profit margin. d) Assess the return on equity (ROE) if shareholders' equity is $80 billion.