Many stores use electronic scanners to determine prices at the check-out counter.
These scanners are linked to a computer that computes the price of the item by reading a code on the product or the tag. Missouri weights and measures officials inspect scanners to ensure they are accurate. If they're not, both consumers and businesses can lose money. Watch as the price of the item shows on the check-out register. Ask the clerk to check the price if you think the scanned price is incorrect.