version:  Odoo 9

Issue:  How to setup 3 warehouses for 3 items only? 

We have 300 items that only has 1 warehouse for receiving.  

However, we have an exception to 3 items, which we will be getting from 3 different warehouses. 

Thus, when there is an order for item ABC, there should be a quantity reflecting how many is available to these 3 different warehouses.  Warehouse#1 has 10 pcs, warehouse#2 has 50 pcs, warehouse#3 has 2pcs. 

And then how can we lessen the qty depending on which warehouse we will be getting?

Please help.  Thank you.