Write an essay for around 1700 words explaining the following ratios:
1. PE ratio (Norah Bader)
2. Operating profit before depreciation (EBITDA) (Norah Bader)
3. Operating Profit (EBIT) (Norah Bader)
4. Return on Sales (ROS) (Norah Bader)
5. Equity Ratio (Hessa Ibrahim)
6. Net debt to equity (Hessa Ibrahim)
7. Return on capital employed (ROCE) (Hessa Ibrahim)
8. Return on equity (Dalal Ebrahim)
9. Earnings per share (EPS) (Dalal Ebrahim)
10. Cumulative total shareholder return (Dalal Ebrahim)