Company: Verizon Communications Inc.

Verizon Communications Inc. disclosed its financial performance for the fiscal year ending December 31, 2023. The company reported total revenue of $150 billion, with a cost of goods sold (COGS) of $70 billion and operating expenses of $50 billion. Net income amounted to $20 billion. Based on 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 investment (ROI) if the company's total investment is $100 billion.