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3) Place item on the platter and do “ADD” function. Ex) unit price=1.99, 1.00 kg
Remove it from the platter.
4) To cancel previous transaction input the same unit price and place the same item on the
platter. Then, press “-” key.
● Remove the item from the platter. For sure user may check total number of a series of
transactions after canceling previous one by pressing “∑” key to call up “ttP(Total Price)”.