Unfortunately, when I attempted to create a schedule I got an error message that stated “This form cannot be scheduled.”.  I did a little research on-line and found that Markusray17 uses business events for this.  Here is a copy of the reply in the Acumatica Community:

Although I am not triggerred at the exact time of the document releasing.
The schedule is running on daily basis.   It also does not require the exactly real-time.

My steps below:
1, using a GI to monitor the  “INitemcost”,  and the INitemcost.lastcostdate>= Today
2, Using the GI as a BE’s datasource
3, Subscribing a import scenario
 

4, Also can subscribe a email to notify the user price has been updated.

Hope this helps.  Here is the link to the thread:

https://community.acumatica.com/distribution-6/automatically-update-sales-price-after-receipt-or-bill-releasing-9166