a supplier for an electronics store has introduced quantity discounts to encourage larger order quantities of cameras. the price schedule is: quantity purchased price per unit fewer than 525 $80 at least 525 $75 suppose the monthly demand at a retail store that buys from this retailer and resells is 175 units. the supplier charges a fixed cost of $180 per shipment. the cameras are expected to sell well for multiple seasons, so multiple replenishment opportunities are possible. if the holding cost is 4.0%, and the retailer implements periodic review to achieve 75% service level, how much should the retailer order if it has 525 units in stock?