I want to confirm a fert which is batch managed and the component of FERT i.e halbs are also batch managed.Now i want to implement batch determination where suppose the habe has 3 batches of stk 5,3,2 and the system require 7 pcs of Halb.Now stestem automatically choos the 1st and 2 batch according to the ascending stock.For doing this what I have to do ?