AccuStock: Bundle Inventory

This app is great. We offer quantity-based variants and this has dramatically improved our ability to manage stock levels.

The way it works:
- Create a product name matching the product you're working on
- Link the correlating variants
- Set how many of that item will be sold if 1 of each variant is purchased
- Enter current stock level
- Select low stock warning (if you want)
After the item is complete in their system, you can manually update the stock level easily. Super easy! It took me 15 minutes to set up.

I also received excellent, fast customer support when I needed help.