| 摘要 |
An electronic calculating device having a keyboard with input keys for the digits 0-9, an item register and display for storing and displaying, in a fixed-point format of dollars and cents, an item-price number entered via the input keys, a separate total register and display for storing and displaying a total number in similar format, and delay logic circuitry for automatically transferring the item-price number to an accumulator for summing with the total number only after a predetermined delay period following entry of the item-price number, the new total number then being entered into the total register and display. Means are provided, through selective operation of function keys prior to the end of the delay period, for applying a programmed tax rate to the item-price number, for correcting the item-price number by inhibiting the delay logic circuitry and clearing the item register, and for subtracting an amount, including tax, from the total number.
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