Walmart Inc.
 Data for the year ended December 31, 2023:

Item	Amount
Total Revenue	$500,000,000
Cost of Goods Sold	$300,000,000
Operating Expenses	$150,000,000
Income Tax Expense	$50,000,000
Net Income	$40,000,000

1. Calculate Walmart's gross profit margin.
2. Determine Walmart's operating profit margin.
3. Analyze the impact of income tax expense on Walmart's net income.
4. Discuss Walmart's revenue recognition policy for merchandise sales.
5. Evaluate Walmart's profitability using the return on assets (ROA) ratio.