Hi Nitu
1. Any order is fine. Preferably create the Op concern first with desired chars and VF
2. You need to tell your Abap the fields required and their length for the Z table
3. Bapi_copaactuals_postcostdata.. You need to tell which field of Z table corresponds to which char or VF, to your Abap
4. Use form based reports.
Br. Ajay M