| 摘要 |
PURPOSE:To correct erroneous input and to prevent unjust input by checking whether the price of a commodity is extraordinarily cheap for the commodity to warn of the execution of erroneous input or unjust input. CONSTITUTION:A control part 2 takes information of an inputted discount amount of money into an input commodity information area 42 and compares the discount rate with a value in a discrimination value storage part 43, namely, a discount limit value by a discriminating part 21 in the control part 2. If the discount rate is equal to or larger than the value in the discrimination value storage part 43, the control part 2 judges erroneous input as erroneous input of ten keys or unjust input, which a clerk tries to cheaply sell a commodity to a familiar customer with a high discount, to give a warning from a warning part 3. Then, discount input data, the discount, and the sale price are initialized, and the equipment is switched to the position for operation of discount input again. |
