Answer: all of the above
Step-by-step explanation:
At the Economic Order Quantity level, the company is enjoying the lowest cost possible in relation to product ordering and storage because they are ordering just enough quantities that they are able to sell them just in time to order some new goods.
For this to happen, the holding cost must be equal to the ordering costs. At the EOQ, the product cost is irrelevant when the quantity to be bought is to be determined because it is minimized.