Berkshire Hathaway Inc. is a multinational conglomerate holding company. For the quarter ended March 31, 20X8, the company provided the following financial data:

• Total revenue: $40,000,000
• Cost of goods sold: $15,000,000
• Selling and administrative expenses: $10,000,000
• Other operating expenses: $5,000,000
• Income tax expense: $8,000,000 Determine the company's net income, gross profit margin, operating income, and net profit margin.