Imagine you're an analyst reviewing the balance sheets of three well-known companies. Analyze the financial health of each company based on their balance sheet information.

Company A: Apple Inc.

• Total Assets: $320 billion
• Total Liabilities: $258 billion
• Shareholder's Equity: ?

Company B: Amazon.com Inc.

• Total Assets: $280 billion
• Total Liabilities: $200 billion
• Shareholder's Equity: ?

Company C: Microsoft Corporation

• Total Assets: $300 billion
• Total Liabilities: $150 billion
• Shareholder's Equity: ?