Auto Composite feature in inventory

Auto Composite feature in inventory

Hello,

I wanted to see if this feature is available:
An auto Composite feature in inventory:
The idea is that the Composite items' inventory amount will always be 0. 
Then only when one item is sold in ZohoCommerce, the system will automatically composite the needed amounts from the oldest lots available.

In case you do not have this feature, is it possible for you to build it for us?

Thank you.
Uri