calculate each ratio for each company for the last three fiscal year-ends 2015-2016-2017.

The ratios:

Accounts Receivable Turnover;

Average Collection Period for A/R;

Current Ratio;

Debt to Equity Ratio;

Inventory turnover;

Average Inventory days outstanding;

Return on Assets;

Return on Equity;

Return on Investment;

Return on Net Operating Assets;

Profit Margin;

Asset Turnover

Consolidated Balance Sheet USD (S) Dec. 31, 2016 Dec. 31, 2015 $ in Millions Current assets: Cash and cash equivalents Short-term investments S 1,680 1,625 546 337 S 1,583 1,468 474 Accounts and other receivables Inventories of parts and supplies, at cost Prepaid expenses and other current assets 188 4,498 4,024 Total current assets Property and equipment, at cost: Flight equipment Ground property and equipment 20,275 3,779 1,190 1.220 26,464 9,420 17,044 970 3,219 1.089 915 24,685 9,084 15,601 9TO Deposits on flight equipment purchase contracts Assets constructed for others Property and equipment, atcost Less al lowance for depreciation and amortization Property and equipment, net Goodwill Other assets Total assets Current llablllties: 23.286 21,312 1,178 1,985 3.115 566 6,844 2,821 3,374 1,078 728 Accounts payable Accrued liabilities 1,188 2,591 Air traffic liability 637 7,406 2,541 2,490 757 760 Current maturities of long-tem debt Total current liabilities Long-term debt less current maturities Deferred income taxes Construction obligation Other noncurrent liabilities Stockholdders' equity: Common stock, S1.00 par value 2.000,000,000 shares authorized 807.611.634 shares issued in 2016 and 2015 808 808 Capital in excess of par value Retained earnings 1,374 9,409 (1,051) 11,418 Accumulated Other Comprehensive Income (Loss), Net of Tax (323) Treasury stock, at cost 192,450,855 and 160,010,017 shares in 2016 and 2015 re (4,872) (3,182) 8,441 7,358 Total stockholders' equity Total liabilities and stockholders' equity S 23,286 S 21,312