how do i find the gross profit margin for each year?

Selected Income Statement Data Net sales Membershlp fees Total revenue Operatlng expenses Merchandise costs Soltlng, general and admlnlstratlve peopenlng expenses PtoVlslon for Impal'ed assets and store closing Costs Total operating expenses Operatlnq Income Other income (expense) Interest expense Interest Income and other. net Income before Income taxes provision for Income takes Net Income attributable to Costco DCuted net Income per Share Olvidends per share Inot including special dividend of $700 in 2017 am-d SS.OO In 2015) Mdllons 01 Shares used tn per share calculations Balance Sheet Data Cash and cash equrvalents MerchandSe Inventories Current assets Current ilablltt:es Net property and equipment Total assets Long-term debt. eyciudlng current port'cn Stockholders' equity Cash Flow Data cash cgv2tating Fiscal Years Ending sept. 2. 2018 sopt. 3. 2017 sept. 1. 2019 $149.35' 3 352 152.703 14.994 147.966 4.737 (150) 4.765 t 061 3.659 826 sept 1. 2019 s 8.384 11.395 23.485 23.237 s. 124 s 138434 3.142 '23.152 '3876 '37.096 s 1.263 3134 7.09 2, 14 "26.172 2.853 '29.025 "1.882 124.914 4.039 '.325 2.679 Years Endlng sept. 2.2018 sept. 3. 2017 19.926 '9,681 S 4.546 9.834 '7.317 '7.4BS 36,347 6.573 Aug. 28.2016 $116.073 2.646 118.719 102.901 12.068 15.047 3672 3.619 1.243 2.350 5.33 1.70 441.3 c.21 Aug. 28. 2016 s 3.379 IS.21g 15.575 17.043 33, '62 12.079 s 3.292