Checkout is a job that involves the processing of customers' purchases at a store. The job requires the use of a LINE to organize customers, scanning ITEMS with a SCANNER, and bagging the ITEMS. The term 'LINE' is used to refer to the queue of customers waiting to be served. 'Scans' is the process of using the SCANNER to read the barcode of an ITEM. 'SCANNER' is the device used to read the barcode of an ITEM. 'SCAN' is the action of using the SCANNER to read the barcode of an ITEM. 'BAGS' are the containers used to store the purchased ITEMS. 'ITEM' is a single product being purchased. 'ITEMS' is the plural form of 'ITEM'.