Company: Walmart Inc.

Item	Amount (in millions)
Revenue	$572,754
Cost of Goods Sold (COGS)	$426,900
Gross Profit	$145,854
Operating Expenses	$100,200
Operating Income	$45,654
Interest Expense	$3,000
Income Tax Expense	$10,500
Net Income	$32,154

Questions:

1. What is Walmart's gross profit margin?
2. Calculate Walmart's operating profit margin.
3. Determine Walmart's net profit margin.
4. If Walmart’s total assets are $244,000 million, what is the return on assets (ROA)?
5. What is the return on equity (ROE) if Walmart’s total equity is $81,000 million?