AT&T Inc.
 Data for the year ended December 31, 2023:

Item	Amount
Total Revenue	$600,000,000
Cost of Goods Sold	$350,000,000
Operating Expenses	$200,000,000
Income Tax Expense	$30,000,000
Net Income	$20,000,000

Requirements:

1. Calculate AT&T's gross profit margin.
2. Determine AT&T's operating profit margin.
3. Analyze the impact of income tax expense on AT&T's net income.
4. Discuss how AT&T's revenue recognition policy affects its financial statements.
5. Evaluate AT&T's profitability using the return on assets (ROA) ratio.
6. Explain the role of the Income Measurement Objective in AT&T’s revenue assurance and investor communication.