Toy Market Pty Ltd Quarters Wooden Toys PTY LTD (PROFIT/(LOSS) BY QUARTER FY2017) Q1 $ Q2 $ Q3 $ Q4 $ Total $ Toy Sales Gaming Sales Book Sales...

please help me calculate following ratio:

1.Gross profit margin

2. Net profit

3. Return on total assets

4. Current ratio

5. Debtors collection period

6. Inventory turnover period

7. Shareholders loans to total assets ratio

8. Times interest earned ratio

please look at attached document.

Requirement: explain how you calculate the ratio& formula to calculate specific ratio