Calculate account receivable turnover ratio for the company and also comment on the collection policy of southwest airline for 2015, 2016 and 2017

deom where can i get the information

Annual Data Millions of US $ except per share data 11 2017-12-31 2016-12-31 2015-12-31 2014-12-31 2013-12-31 2012- $21.146 $19,820 $18,605 1 965 L 706 259 $20,289 $12,843 $7.446 $13,674 $7,472 $13.111 $12.408 $7,412 $17.699 $13,342 $4,357 $5.494 $ 2.242 $15.704 L 852 758 206 3-42 164 699 LU 465 $ 2.847 517,739 $3,407 5-142 Revenue Cost Of Goods Sold Gross Profit Research And Development Expenses SG&A Expenses Other Operating income or Expenses Operating Expenses Operating Income Total Non-Operating Income Expense Pre-Tax Income Income Taxes Income After Taxes Other Incom Income From Continuous Operations Income From Discontinued Operations Net Income EBITDA EBIT Base Shares Outstanding Shanes Outlanding Basic EPS EPS - Earnings Per Share 5-2.703 516,767 $3.522 5-72 $3,450 51.267 $2.183 5-2 205 $16:380 $2.225 5-409 $1,816 $4.116 5-637 $3,479 $1.298 $2,181 S-2126 $18.421 $1,278 3-89 $1.209 $455 5754 $3,265 S-92 $3,357 5680 $1,136 LH 465 $3,357 52.183 52,181 $1,136 5754 $3,357 $4,625 $3,407 52.183 $4,743 $3,522 627 $2,181 $5,131 $4,116 465 407 206 La 573 Al 574 a 1.30 1.29 $1,136 $3,163 52.225 687 090 5754 $2.145 51.278 501 061 710 889 718 603 $5.58 $5.57 033 $3.48 $1.65 53.30 $3.27 $1.00 $1.05 $3.45 31.64 ws.convedal WSJ MARKETS Home World U.S. Pocs Economy Business Tech Markets Opinion Life & Arts Real Estate W Magazine Assets Fiscal year is January-December All values USD Milions 2019 2018 2017 2010 2015 Cash & Short Term Investments 4,072 3,689 3.273 3.305 3.051 Cash Only 2,548 1,854 1.495 1.680 1,583 Short-Term Investments 1,524 1,835 1.778 1.625 1,468 Cash & Short Term Investments Growth 10:38 12.71% -09 8.33% 15.07 Cash & ST Investments / Total Assets 13.51% 09 12.49 474 Total Accounts Receivable 568 1,086 568 944 502 546 474 Accounts Receivables, Net 344 560 546 4713 Accounts Receivables, Gross 142 Other Receivables 91207 - 14.20 21.25% Accounts Receivable Growth 2065 30.07 31.94 37.10 Accounts Receivable Turnover 529 461 337 311 Inventories 311 529 451 Raw Materias EH 287 310 Other Current Assets TI o BE DNG