单项选择题
Computers are beneficial because they ______.
A.eliminate price errors
B.give itemized printout to the customer
C.save time in the checkout lane and help control inventory
D.all of the above
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单项选择题
Codes are scanned by ______.
A.the checkout clerk
B.the customers themselves
C.a laser beam of light
D.the cash register
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单项选择题
What information CANNOT be obtained from the UPC
What information CANNOT be obtained from the UPC
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