The financial summary for GHI Ltd. for the year ending 2023 is as follows:

• Sales Revenue: $900,000
• Manufacturing Costs: $540,000
• Administrative Expenses: $120,000
• Distribution Costs: $110,000
• Interest on Debt: $30,000
• Corporate Taxes: $50,000

Requirements:

1. Prepare an income statement.
2. Calculate the gross profit margin.
3. Determine the operating profit margin.
4. Compute the net profit margin.
5. Evaluate the impact of a 10% increase in sales revenue on the net profit margin.