When classifying by Part number or Order number you can decide if the values in the lists Standard or Diff shall be displayed as "amount per piece" or as a total amount. If you choose Total amount, you can see the amount per piece in a small yellow box that appears when you rest your mouse over the calculated values once the list has been loaded onto your screen. If you, on the other hand, choose Amount per piece you will see the total amount in the yellow box.