prorated product cancellation and inverted amount rouding problem.

Is there any possibility in BRM OOB to calculate inverted amount not based on new computed scale ,but based on days at which we have this product active ?  For example we activate product on 11.09.2017 and scale for that is 0.6666667 , when we cancel product on 15.09.2017 we got  inverted amount with scale 0.533333333, but What I want is to revert old amount, and compute new scale based of start and end date of product.