Can someone please help me with find the Gross Profit Margin, Operating Profit Margin, Pre-tax Net Profit Margin, Pre-tax Return on Equity and the

Can someone please help me with find the Gross Profit Margin, Operating Profit Margin, Pre-tax Net Profit Margin, Pre-tax Return on Equity and the Pre- Tax Return on Assets, I was able to find the industry average, but i’m struggling with the others. I used the Amazon 2015 and 2017 Annual AR 10K report.