As opposed to seeing the total of a line discounted, we need to see the discounted price of an item. So if a widget costs $100, and I apply a 20% discount, I should see that the price per item is $80, as opposed to what I see now, which is that they cost $100 ea. but that the total of 2 costs $160.00

The customer wants to know what they are paying per item, as well as what their total cost is.