Calculate and compare the following items Amazon for 2020 year. Make sure you describe what you are measuring and how it changed from year to year and if the change was good or bad for the company and why. If possible, identify what factors affected each ratio or change. (What were the causes?):

Sales increase (decrease) from prior year.

Gross Profit margin

Working Capital (Current assets Current Liabilities)

Liquidity Ratios (Current and quick ratios)

Return on assets

Financial Leverage Ratio

Return on Equity

Inventory Turnover ratio