Problem 2) (14 points) A manager has just received a revised price schedule for its main product from a vendor as seen in the table below. What order quantity should the manager use to minimize total costs? Annual demand is 12,000 units, ordering cost is $180, and annual carrying cost is $3 per unit (regardless of the price per unit). Quantity Unit Price 1 to 999 $11.50 1,000 to 1,999 $11.35 2,000 to 2,999 $11.25 3000 or more $11.20