Find the Maximum Stock level from the following: Consumption rate is 80-100 units per week Delivery period is 5-7 weeks EOQ is 660 units.

A company uses 3000 units of material per month. Cost of placing an order is Rs.200.The Cost per unit is Rs. 20. The reorder period is 4-8 weeks. The minimum consumption of raw material is 100 units to 350 units whereas the average consumption is 275 units. The Carrying cost of inventory is 20% per annum. 

Calculate: EOQ/ Re-order quantity Re-order level.