Whispering Ltd. Has the following quantity discount policy with its supplier Evanora Inc. Quantity Price per Case 1-299 cases $21.00 300-749 cases $19.63 750-1,499 cases $18.50 1,500 + cases $17.30 The economic order quantity is 140 cases and the annual usage is 19,600 cases. The ordering cost (K) is $6 per order and the carrying cost of inventory (H) is $12 per unit