Scooter's Scooters is a large American manufacturer of electric scooters operating out of Lansing. Currently, the company produces all of its scooters using a single manufacturing facility, its factory in town. Recently, management has been considering expanding operations to one or two additional factories. The following table presents the manufacturer's monthly short-run average total cost (SRATC) for various levels of production if it operates out of one, two, or three factories. (Note: Q equals the total quantity of scooters produced by all factories.) Suppose Scooter's Scooters is currentiy producing 600 scooters per month in its only factory. Its short-run average total cost is per scooter. Suppose Scooter's Scooters is expecting to produce 600 scooters per month for several years. In this case, in the long run, it would choose to produce scooters using