Analyze the trend in gross profit margin for a company over the past three years. Given the following data:

• Year 1: Sales Revenue = $600,000, COGS = $360,000
• Year 2: Sales Revenue = $700,000, COGS = $420,000
• Year 3: Sales Revenue = $800,000, COGS = $460,000

Calculate the gross profit margin for each year and discuss the trends. Explain possible reasons for changes in the gross profit margin, such as changes in pricing strategy, cost control measures, or shifts in product mix. Consider the impact of external factors such as market competition, supplier price changes, and economic conditions on the gross profit margin. How can the company strategically manage its gross profit margin to ensure sustainable profitability? Discuss the potential benefits and risks associated with various strategies such as cost-cutting measures, price adjustments, or product differentiation.