AT&T Inc. reports the following data for its Communications segment for the year ended December 31, 2023:

Income Statement

• Sales revenue: $110,000,000
• Cost of goods sold: $60,000,000
• Gross margin: $50,000,000
• Operating expenses:
  • R&D expenses: $10,000,000
  • Marketing expenses: $8,000,000
• Operating income: $32,000,000
• Nonoperating items:
  • Interest expense: $3,000,000
  • Foreign exchange gain: $500,000
• Net income: $29,500,000

Balance Sheet

• Assets:
  • Cash: $12,000,000
  • Accounts receivable: $10,000,000
  • Inventory: $8,000,000
  • Property, plant, and equipment: $40,000,000
• Total assets: $70,000,000
• Liabilities:
  • Accounts payable: $5,000,000
  • Short-term loans: $6,000,000
  • Long-term debt: $20,000,000
• Stockholders' equity: $39,000,000
• Total liabilities and stockholders' equity: $70,000,000

Requirements:

1. Calculate the gross profit margin.
2. Determine the operating profit margin.
3. Compute the return on equity (ROE).
4. Calculate the debt-to-assets ratio.
5. Find the quick ratio.