12. Tokla Chemical Limited sells 240,000 bags of lawn fertilizer annually. The optimal safety stock (which is on hand initially) is 1,200 bags. Each bag costs Rs 4, inventory carrying costs are 20 percent, and the cost of placing an order with its supplier is Rs 25. Use 360 days in calculations. What is the most economical order quantity? b. What is the optimal numbers of orders to be placed? c. At what level of inventory should a reorder be made? Assume lead time of 3 days. a. Livrohol yn will