unshipped, available, 

Inventory quantity update types

Unshipped, in stock, relative, absolute https://community.channeladvisor.com/s/article/KB-Using-Inventory-Quantity-Update-Types

Send Unshipped qty - 

1. Unshipped - this is the quantity of orders we have from CA but have not provided a tracking number yet
2. In Stock - 
3. Relative - adds to the current absolute value
4. Absolute - available product to sell - 

Incremental update

Update quantity WPF