The on hand quantity field displays the total amount of product available to be sold for the currently selected item in the line item grid.

 

If the item has a unit of measure of LB., the on hand weight of the item will be displayed.

If the item is sold by the pound, both the on hand quantity and the on hand weight will be displayed in the format OH QTY / OH WGT

If the item is sold by the unit, only the on hand quantity will be displayed.