14. Under credit terms of 1/5, net 15, customers should: A. always pay on the 15th day. B. take the 5 percent discount and pay immediately, c. take the discount and pay on the day following the day of sale. D. either take the discount or pay on the 15th day, E. both take the discount and pay on the 15th day. 15. The EOQ model is designed to determine how much: A. total inventory a firm needs in any one year. B. total inventory costs will be for any one given year. c. inventory should be purchased at a time. D. inventory will be sold per day. a firm loses in sales per day when an inventory item is depleted. E