From the following information, calculate:

Gross Profit Ratio

Operating Ratio

Operating profit Ratio

Net profit ratio

Opening stock $=2600$

Purchases $=8000$

Wages $=2400$

Manufacturing expenses $=1600$

Sales $=16000$

Closing stock $=3800$

Selling expenses $=400$

General expenses $=2400$

Loss of furniture due to fire $=80$

The compensation received for land acquisition $=480$