Doubt on Group Condition with Scales

Hello, I want to know the output of using Group Condition check box in Condition type along with SCALES maintained for it.

Ex:- I maintained Scales as

qty Amount

1-10 100 usd

11-50 105 usd

51-150 110 usd.

If my total line item quantity in PO is 120. How the discount will be distributed. Kindly help as early as possible.

Thanks in advance