Rocky Mountain Tre Center sells 6,000 go-cant tires par year. The ordering cost for each order in $35, and the holding cost is 50 ss of the purchase price of the tires per year. The purchase price is 519 per tire if tewer than 200 tires are ordered, 518 per tre if 200 or more - but lewer than 5,000 - fires are crdered, and $13 por tire if 5.000 or more fires are ordered. a) How many tires shouis Pocky Mountain order each time it places an order? Rocky Mountair's optimal order quantity is units (enter your response as a whole number)