4 The Economic Order Quantity ( EOQ) model essentially makes a trade-off between ordering costs (fixed costs per order) and inventory holding costs (variable costs per item held). Which of the following statements is true? The point where the order quantity is an optimum occurs when inventory holding costs equal ordering costs. As the order quantity Q increases, the inventory holding costs increase too. As the order quantity Q increases, the cycle stock increases too. All-units discounts tend to reduce inventory holding costs in the supply chain. The ordering costs are a linear function with respect to order quantity. None of the above