         “Sentence 1: To begin with, the adoptiongf bar  caites: came’ before: ».rapid epg  arrangerients because tetailers required   cost means ‘of: collecting. information. at the  detailéd product level for. their own use'that is,  they. first, developed an. efficiengg method ‘for.  scanning prices at the check-out: régister. and  tracking’. products for: internal: inventory.  purposes. on :    Sentence.2:'Barcodés aré a-low cost means. of  representing. and’: callecting. retailers":  itiformation, :