Astainless steel knife set is one item it stocks. demand (2,400 sets per year) is relatively stable over the entire year. whenever new stock is ordered, a buyer must ensure that numbers are correct for stock on-hand and then phone in a new order. the total cost involved to place an order is about $5. rw figures that holding inventory in stock and paying for interest on borrowed capital, insurance, and so on, add up to about $4 holding cost per unit per year. analysis of the past data shows that the standard deviation of demand from retailers is about four units per day for a 365-day year. lead time to get the order is seven days. what is the economic order quantity?