Sales Invoice Item Net Total

In Sales Invoice “NET TOTAL” is one column which holding sum of all item Amount (Sales Item Invoice),
So i want to know where is this JS file (Or Code) . i have checked in Sales Invoice but didn’t found any NET TOTAL column. Please help me about it
Thanks in advance

Please check Setup > Customize > Customize Form view for column names.

Thanks Sir

But sir i want JavaScript file name where “NET_TOTAL” is getting calculated

You can always do a code search.

Thanks for the link but I am looking for the file for V4. I guess this is for V5.

You can always do code search for “net_total”