ㅇ Calculate the amount by item by entering the quantity and price of each item
* Frequently used items are stored separately for quantity and price, and can be called up when needed for easy use.
ㅇ Separately save details of item price calculation if necessary
ㅇ If necessary in the future, the saved calculation details can be recalled and used, and can be modified and saved again.

[Main purpose of use]
- Buy items shopping calculator when shopping or purchasing
- Calculator of sales item amount when selling
- List calculator such as price and quantity by list when managing items