RETURN ON SALES (PROFIT MARGIN) (%): 
Online Profit Margin Ratio Calculator
The Profit Margin of a company determines its ability to withstand competition and adverse conditions like rising costs, falling prices or declining sales in the future. The ratio measures the percentage of profits earned per dollar of sales and thus is a measure of efficiency of the company.
The formula:
Return on Sales or Profit Margin = (Net Profit / Net Sales) x 100