Add an item by typing in the search bar and clicking add. Added products will show in green
Simply Click the trash icon in the row or open the sidebar to remove a product. Removed products will show in red
To replace items, delete the one you want to replace, then add the new item.
To change quantity, you must delete the item, and re add it with the appropriate quantity.
You can change the cost but you must delete the item, and add again with the appropriate price.
You cannot change the labor on products in the BOM already. Instead you can delete the product and then show labor separately.