Select all that are correct

Ali has a restaurant where the customers use a different number of disposable cups each day he is open. Every 30 days. Ali places an order to replenish his cup inventory. It takes 4 days for the order to arrive at which point it brings the inventory level up to 3000 cups. It costs All $25 to have the order processed. Select all statements that apply to Ali's situation: Ali uses a Fixed-Order-Quantity Inventory System d is constant Maximum Inventory Level is constant All uses a Continuous Inventory System Ali uses a Periodic Inventory System