Where does Sales invoice fetch item price from?

Hi all,

Can anyone tell me from where sales invoice pulls item price from? I want to change the code so that it fetches prices batch wise.

I am unable to find the code anywhere, and the “fetch from” fields are empty

thank you

Check below docs link

For code refer below link

Thank you, that will help

Follow up question. From where is item price inserted into the backend? where can i find the code?