Urgent please

The following are the ratios relating to the activities of Technopak Limited: Debtors Velocity 3 months Stock Velocity 8 months Creditors Velocity 2 months Gross Profit Ratio 25 per cent Gross profit for the current year ended December 31 amounts to * 4,00,000. Closing stock of the year is 10,000 above the opening stock. Bills receivables amount to *25,000 and bills payable to 10,000. Calculate: a. Sales b. Sundry Debtors c. Sundry Creditors