The costs of placing an order are Rs. 150 per order . It is estimated that 1000 units will be used in the next 12 months. The carrying cost per month is Rs . 2.50. Assuming that the demand is deterministic and continuous and that no stock-outs are allowed, determine the optimal order quantity. What is the time between the placing of orders? The procurement lead time is one month. What is the re-order point based on the on-hand inventory level?