    Sentence 1: To begin with, the adoption  of bar codes came before rapid  replenishment arrangements because  retailers required a low-cost means of  collecting information at the detailed  product level for their own use’that is,  they first developed an efficient  method for scanning prices at the  check-out register and _ tracking  products for internal inventory  purposes.    Sentence 2: Bar codes were never  adopted for information collection by  retailers.