Answers in yellow must have formula with cell reference (ex: c14-c2) to help me understand. Thank you

A B C Dec. 31, 2015 Dec. 31, 2014 $ 1,972 1,465 2,020 $ 2,088 1,217 2,297 119 925 379 534 318 318 1,987 796 9,056 1,078 701 9,158 23,039 21,929 1 Consolidated Balance Sheets - USD ($) $ in Millions 2 Current Assets: 3 Cash and cash equivalents 4 Short-term investments Accounts receivable, net of an allowance for uncollectible accounts of $9 and $11 at 5 December 31, 2015 and 2014, respectively 6 Hedge margin receivable 7 Fuel inventory Expendable parts and supplies inventories, net of an allowance for obsolescence of $114 8 and $127 at December 31, 2015 and 2014, respectively 9 Hedge derivatives asset 10 Prepaid expenses and other 11 Total current assets 12 Property and Equipment, Net: Property and equipment, net of accumulated depreciation and amortization of $10,871 13 and $9,340 at December 31, 2015 and 2014, respectively 14 Other Assets: 15 Goodwill Identifiable intangibles, net of accumulated amortization of $811 and $793 at December 16 31, 2015 and 2014, respectively 17 Deferred income taxes, net 18 Other noncurrent assets 19 Total other assets 20 Total assets 21 22 Current Liabilities: 23 Current maturities of long-term debt and capital leases 24 Air traffic liability 25 Accounts payable 26 Accrued salaries and related benefits 9,794 4,861 9,794 4,603 4,956 1,428 21,039 53,134 7,595 926 22,918 54,005 1,563 4,503 2,743 3,195 1,184 4,296 2,622 2,266 B81 x x B 2,581 1,635 1,306 17,526 2,772 1,580 2,127 16,847 6,766 13,855 2,246 1,891 $ 24,758 8,477 15,138 2,602 2,128 $ 28,345 27 Hedge derivatives liability 28 Frequent flyer deferred revenue 29 Other accrued liabilities 30 Total current liabilities 31 Noncurrent Liabilities: 32 Long-term debt and capital leases 33 Pension, postretirement and related benefits 34 Frequent flyer deferred revenue 35 Other noncurrent liabilities 36 Total noncurrent liabilities 37 Commitments and Contingencies 38 Stockholders' Equity: Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 799,850,675 and 39 845,048,310 shares issued at December 31, 2015 and 2014, respectively 40 Additional paid-in capital 41 Retained earnings 42 Accumulated other comprehensive loss Treasury stock, at cost, 21,066,684 and 19,790,077 shares at December 31, 2015 and 2014, 43 respectively 44 Total stockholders' equity 45 Total liabilities and stockholders' equity $0 $ 0 10,875 7,623 (7,275) (373) 12,981 3,456 (7,311 (313 10,850 $ 53,134 8,813 $ 54,005 46 12 Months Ended Dec. 31, 2015 Dec. 31, 2014 47 Consolidated Statements of Operations - USD ($) $ in Millions 48 49 Passenger: 50 Mainline 51 Regional carriers 52 Total passenger revenue 53 Cargo 54 Other $ 28,898 5,884 34,782 813 5,109 $ 28,688 6,266 34,954 934 4,474 A 40,704 40,362 8,776 6,544 4,241 1,848 1,848 1,835 1,672 1,493 1,490 872 8,120 11,668 5,237 1,828 1,749 1,771 1,700 1,442 1,085 810 250 233 716 55 Total operating revenue 56 Operating Expense: 57 Salaries and related costs 58 Aircraft fuel and related taxes 59 Regional carriers expense 50 Aircraft maintenance materials and outside repairs 51 Contracted services 52 Depreciation and amortization 53 Passenger commissions and other selling expenses 54 Landing fees and other rents 55 Profit sharing 56 Passenger service 57 Aircraft rent 58 Restructuring and other 59 Other 70 Total operating expense 71 Operating Income 72 Non-Operating Expense: 73 Interest expense, net 74 Interest Portion of Lease, net 75 Total non-operating expense, net 76 Income Before Income Taxes 77 Income Tax (Provision) Benefit 78 Net Income 79 30 B1 Times Interest Earned 32 Fixed Charge Coverage 33 Debt Ratio 34 Debt to Equity Ratio 35 1,998 32,902 7,802 1,797 38,156 2,206 (481) (164) (645) 7,157 (2,631) $ 4,526 (650) (484) (1,134) 1,072 (413) $ 659 A B C 250 233 35 716 1,998 32,902 7,802 1,797 38,156 2,206 67 Aircraft rent 68 Restructuring and other 69 Other 70 Total operating expense 71 Operating Income 72 Non-Operating Expense: 73 Interest expense, net 74 Interest Portion of Lease, net 75 Total non-operating expense, net 76 Income Before Income Taxes 77 Income Tax (Provision) Benefit 78 Net Income 79 80 81 Times Interest Earned 82 Fixed Charge Coverage 83 Debt Ratio 84 Debt to Equity Ratio 85 Debt to Tangible Net Worth 86 (481) (164) (645) 7,157 (2,631) $ 4,526 (650) (484) (1,134) 1,072 (413) $ 659 87