you are the supply chain manager at a bookstore. one of the items the bookstore is selling is calculators. the relevant information about the calculators is as follows: annual demand for an item is 400 units the cost to place an order is $10 the per unit purchasing cost of the item is $100.00 the annual holding rate is 5% lead time is 60 days the number of days per year is 360 days use the above data and eoq model to answer the following questions: (choose the nearest answer)