Picking the right quoattion and the value should show in PO

Dear All,

When comparing quotations the CST and VAT applicable Suppliers where VAT may be Cenvatable or Not and CST is not Cenvatable .After maintaining comparision in quotations it has to pick the right supplier quotation depending on which condition type and should show in the PO as Non Deductable Tax.

It should differenciate with the Cenvatable amount and Non Cenvatable amount which should show in PO

Please suggest me which are all Condition types with Controal data should i Difine in my Pricing Procedure.

Thanks,

Tiru