The unit price is calculated in real time from the input price and weight.
The item with the lowest unit price is the most affordable.
As for the number on the left, the background color will be green for the item with the lowest unit price and red for the item with the highest unit price.
Up to five items can be compared.
[AC] Clear all the items by long pressing the button.
[←] The selected item will be clear by long pressing the button.