Which function to do adjust price for sales order after invoicing?

Hello every body,

I have 1 case as below. Please review and answer my question.

Step 1: I posted invoice from sales order (qty = 10, unit price = 100$, non-tax)

System posted:

Dr Customer balance account 1000$

Cr Revenue account 1000$

Step 2: I must adjust price from 100$ to 150$. i want to create sales order with qty = 1, unit price = 50$. 

I want to system post only:

Dr Customer balance account 50$

Cr Revenue account 50$

and this item is not issued from stock.

Please tell me if system has function which can support this requirement in AX 2012R3?

Thanks so much!