How do I calculate net revenue margin

Show me the way to calculate % margin of a product.

How can I calculate net profit Margin?

Proposal A Proposal B Proposal C Selling price $99 $129 $99 Variable cost 55 129 49 Contribution margin $44 $0 $50 Contribution margin ratio How do I calculate the contribution margin ratio and is the contribution margin correct? Thank you,

Here's my question... For the year ending december 31, 2009 Ebanks Inc, earned an ROI of 12%. Sales for the year $96 million, and average asset turnover was 2.4 Average owners' equity was $32 million. Calculate Ebanks, Inc margin and net income Calculate Ebanks, Inc's return on equity

I was asked to calculate the Net Profit Margin by using Stockholders Equity, Asset Turnover and Equity Multiplier, but can't figure how to do it without the Return on Investment percentage, any ideas? :confused: Thanks