15. Walmart Inc., a multinational retail corporation, presented the following data:

• Sales Revenue: $4,000,000,000
• Variable Costs: $2,500,000,000
• Fixed Costs: $1,000,000,000
• Interest Expense: $200,000,000
• Depreciation: $250,000,000
• Tax Rate: 28%
• Total Assets: $3,500,000,000
• Total Liabilities: $2,500,000,000
• Shareholders' Equity: $1,000,000,000

Requirements:

1. Prepare an Income Statement for Walmart.
2. Calculate the Contribution Margin.
3. Determine the Break-Even Point in units (assume the average sales price per unit is $20).
4. Calculate the Debt-to-Equity Ratio and Interest Coverage Ratio.