How apply penalty conductions then return PO?

Hi,

My Client has a requirement for return process with reference to PO.

Whenever we receive the material with reference to PO

1. There will be quality check if the material fails the QC then the material will be rejected and vendor have to pay 2% penalty for the returned material.

2. If the material is rejected from the production floor then also material will be rejected and then vendor need to pay 5% as penalty.

3. If the material is short fall (if the vendor invoice is 100 & GR is 90 the vendor has to pay 200% for 10PC short material)

How return the material and apply the penalty conductions. How can we map this process in to sap please guide.