Luan,
Unfortunately, Optimizer does not create any pegging when it creates its solutions. This fact is probably irrelevant, since it appears you are manually creating these receipt elements, and your planning engine probably does not 'know' that these elements are linked.
I have never tried this, but it may be possible to create pegging relationships by creating and running a customized heuristic; after the optimizer has finished its solve.
As I said before, you should probably just hand this problem off to your programmers. They may have a better idea than the use of pegging.
Below is the generic help about pegging in general.
Best Regards & good luck,
DB49