Check out this feature video that was added to our recent 4.30 Release.
4.30 Additional Cost Backflush Control
Functionality has been enhanced to allow additional costs to be included in cost rollup calculations but not included in backflushed batch production. The user has the ability to toggle between the formula and the component level and determine if some additional costs should be part of the backflush or not (ex. some costs part of the cost rollup and other costs part of the batch cost).