Company: Microsoft Corporation

Microsoft Corporation experienced a successful fiscal year ending June 30, 2023. The company's total revenue amounted to $250 billion, with a cost of goods sold (COGS) of $70 billion and operating expenses of $100 billion. The net income for the period stood at $60 billion. Given this data: a) Calculate the gross profit margin. b) Determine the operating profit margin. c) Compute the net profit margin. d) Assess the return on investment (ROI) if the company's total assets are $400 billion.