How to set store inventory to zero from HQ

We closed one of the store last month, so I need to set item quantities to zero for closed location.  I could have set the quantities to zero at store before we unplugging the store POS, but its too late now as that location POS is gone.  

Is there a way to set closed store quantity to zero directly at HQ?  I see total quantities stored in  Item table and individual store quantity stored in Itemdynamic table but have no idea what I need to update and what I shouldn't.  Any help would be greatly appreciated.

Thanks in advance,

Js