My Visual Database — How can i make stock remaining field with calculation field?

Re: How can i make stock remaining field with calculation field?

null@example.com (gamingmastar) — Tue, 23 Apr 2019 05:15:46 +0000

Thanks Its useful for me.

null@example.com (DriveSoft) — Mon, 22 Apr 2019 13:24:11 +0000

Hello.

null@example.com (derek) — Mon, 22 Apr 2019 11:54:11 +0000

Hi,
The exact calculation depends on how you're holding your data but the syntax is something like the calculated field in the attachment.
Derek.

null@example.com (gamingmastar) — Mon, 22 Apr 2019 04:38:42 +0000

i need something like that, i make invoice and stock also shows how many stock left ?