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

Item	Amount
Total Revenue	$600,000,000
Cost of Goods Sold	$350,000,000
Selling, General, and Administrative Expenses	$150,000,000
Income Tax Expense	$50,000,000
Net Income	$50,000,000

1. Calculate Berkshire Hathaway's gross profit margin.
2. Determine Berkshire Hathaway's operating profit margin.
3. Analyze the impact of income tax expense on Berkshire Hathaway's net income.
4. Discuss Berkshire Hathaway's revenue recognition policy for various business segments.
5. Evaluate Berkshire Hathaway's profitability using the return on equity (ROE) ratio.