208 Chapter 7 Demand Forecasting in a Supply Chain TABLE 7-4 Quarterly Historical Demand for Clear and Black Plastic Containers Year 1 Quarter Black Plastic Demand (000 lb) Clear Plastic Demand (000 lb) 2,250 3,200 1,737 7,658 2,412 4,420 7,269 2,384 2 3,514 3,654 2,143 8,680 3,459 5,695 IV 7,056 1,953 3 4,120 4,742 2,766 13,673 2,556 6,640 8,253 2,737 5,491 3,486 || 4,382 13,186 4,315 5,448 IV 12,035 3,485 5 5,648 7,728 3,696 16,591 4,843 8,236 IV 13,097 3,316