Quantity discount

Sir after watching your lecture on chapter 4 of the notes there are few steps given for quantity discounts and it says that: 1) calculate EOQ ignoring discount 2) If it is below the quantity which must be ordered to obtain discounts, calculate total annual inventory costs [That means that if EOQ units < quantity demand to obtain discounts (i.e. 5000 or 10,000 units) then calculate total inventory costs. We already know that if we order EOQ units we have lower reorder cost & lower holding cost and any order quantity above EOQ units will result in higher reorder cost & higher holding cost so we only calculate each order quantity to see how much of the total cost do we save because of discount on purchase price] Please do correct me if I write something incorrectly. I know the rest of the steps. Thanks to your lecture :)