Goldman Sachs Group, Inc. Financial Data for 2023:

• Total Revenue: $60 billion
• Cost of Goods Sold: $30 billion
• Operating Expenses: $20 billion
• Interest Expense: $3 billion
• Tax Expense: $5 billion
• Total Assets: $150 billion
• Total Liabilities: $80 billion

1. Calculate the gross profit margin.
2. Determine the net profit margin.
3. Compute the times interest earned (TIE) ratio.
4. Calculate the equity multiplier.