What will happen for lot costed product yield cost when the final cost is run and PMAC period is clo

Here is a scenario.

Customer using Lot cost as fiscal policy cost method and the alternate cost is PMAC.  They are running final lot cost and other PMAC cost process in final mode including create accounting for each periods (monthly). Now in every period, there are some batches with status WIP. There is some yield of lot costed product in one period (FEB-16) which is closed and final lot cost run say till 29-FEB-2016. Now this batch was in WIP in Feb-16 and some other yield happens in Mar-16 period from the same batch in same lot  then they are closing the batch in