Using the latest 3 years of 10k reports (not annual reports) from the SEC or company website, you will perform the following tasks for Amazon on years 2019 and 2020:

1. Calculate ROI for the last two years and compare the ratios.
2. Calculate the sales margin for the last two years.
3. Calculate the capital turnover for the last two years.
4. Calculate the residual income for the last two years. You may need to search the notes for the target rate of return
5. Analyze the company. Talk through the ratios and explain if each is good, bad or ugly.

Would you invest or not and why?