Stock transfers | inventory valuation

Dear Experts

I have Query Regarding the Valuation of Inventory

The company has opted for the weighted average method for ascertainment of inventory cost. 

The company has 3 branches and the valuation of inventory is done branch wise.

My Query is how the branch transfer will be accounted in the books, Since the method is weighted average the rate of inventory changes as per transaction, and rate of moving average in one branch will be different from other branches

Thanks and Regards