The Carpet Discount Store has annual demand of 10,000 metres of Super Shag carpet. The annual carrying cost for a metre of this carpet is $1.25, and the ordering cost is $300. The carpet manufacturer normally charges the store $8 per metre for the carpet. However, the manufacturer has offered a discount price of $6.50 per metre if the store will order 5000 metres. How much should the store order, and what will be the total annual inventory cost for that order quantity?