Exhibit 9 THE BOEING 7E7 Sensitivity Analysis of Project IRRs by Price, Volume, Development, and Production Costs Price Premium Above Expected Minimum Price Unit Volume (First 20 Years) 0% 5% 10% 15% 1.500 10.5% 10.9% 11.3% 11.7% 1,750 11.9% 12.3% 12.7% 13.1% 2,000 13.0% 13.5% 13.9% 14.4% 2,250 14.1% 14.6% 15.1% 15.5% 2,500 15.2% 15.7% 16.1% 16.6% 2,750 16.1% 16.6% 17.1% 17.6% 3.000 17.1% 17.6% 18.1% 18.6% Development Cost of Goods Sold as a Percentage of Sales Costs 78% 80% 8296 84% $6,000,000,000 21.3% 18.7% 15.9% 12.6% $7.000.000.000 19.4% 17.0% 14.4% 11.3% $8.000.000.000 17.9% 15.7% 13.2% 10.3% $9.000.000.000 16.6% 14.5% 12.1% 9.4% $10,000,000,000 15.5% 13.5% 11.2% 8.6%