Inventory turnover ratio = (Cost if revenue from operations)/(Average inventory)
Cost of revenue from operation = Opening stock + Purchase – Closing stock
= Rs. 80,000 + 1,90,000 – 60,000
= Rs. 2,10,000
Average Inventory = (Opening inventory + Closing inventory)/2
= (80,000 + 60,000)/2
= 1,40,000/2
= Rs. 70,000
Inventory Turnover Ratio = 2,10,000/70,000
= 3 times