I’ve got some information for you about QuickBooks inventories, @lacinnamonbread.
When you break your case to fill the items you sell by piece, it can cause a negative figure to your inventory quantity on hand. Please know that the program depends on the number of inventory items you’ve set up. So once you sell beyond its existing quantity, QuickBooks will set it to negative. And possibly you’ll be prompted that the components to make a bundle or assembly is lacking.