Bigbasket sells $550$ units per month of Sunsilk shampoo sachet $.$ The unit cost of a sachet is Rs $7$ and the cost of placing an order is Rs $44.$ Bigbasket uses an inventory carrying change of $20\%$per year. Determine the optimal quantity, order frequency and the annual cost of inventory management.If through $,$ automation of the purchasing process,the ordering cost can be cut to Rs $20.$what will be the new economic order quantity,order frequency and annual inventory management cost? Explain these result