Let me help share how you can track inventory assembly in QuickBooks Desktop, @Liftco.
As of the moment, there isn't an integrated way to automatically split the items of your inventory upon receiving them. It's best to manually create an item receipt transaction to track the quantity of your inventory and pay the related expense accordingly.
Therefore, I've got you a couple of articles below to understand how you can receive an item:
Meanwhile, selecting the cost while creating your assembly item is base on your accounting practices. The following choices are different by:
- Use Global Preference - the setup you use in the item and inventory preferences
- Use Defined Cost - setting up the cost yourself
- Use Total BOM Cost - the total cost of the components used in the bill of materials
I'm adding this article to learn more about building your assembly: Track the Products you Manufacture in QuickBooks Desktop Premier, Enterprise, or Accountant.
You may also read through this reference with the steps you're able to use to track the status of your inventory and assembly items: Ready-made Item Reports in QuickBooks Desktop.
If you have any other questions with tasks related to managing your inventory assembly, please let me know in the comments below. I'll be here to lend a helping hand. Take care!