This is just the place to get the answers you're looking for, @jbutler-lifefuels!

Yes, you can map a separate COGS account for SKUs B, C, and D that you've set up as a single item and as a bundle. All you have to do is choose the appropriate COGS account for each setup. I'll guide you how.

1. Go to Lists and select Item List.
2. Right-click on the item name and choose Edit Item.
3. Select the appropriate COGS account from the COGS Account drop-down. Refer to these screenshots.
   • For the Inventory Part item type:
      
   • For the Inventory Assembly (bundle) item type:
      
4. Click OK.

Let me also add these articles to learn more about managing your items and cost of good sold in QuickBooks Desktop:

• Add, Edit, and Delete Items
• Understand Inventory Assets and Cost of Goods Sold Tracking
  
  

I'm always here if you have other questions. Have a wonderful day!