Working Capital Turnover Ratio = Cost of sales / net working capital
Where Net Working Capital = Curent Assets – Current Liabilities
= Cash + Bills Recievable + Sundry Debtors + Stock – Sundry Creditors
= 1,00,000 + 50,000 + 2,50,000 + 2,00,000 – 3,00,000
= 3,00,000
Working Capital Turnover Ratio = (15,00,000 / 3,00,000)
= 5 times