Hi Suman,
You can achieve this by creating and assigning following DAPs
Create a two DAPs each for Write Access to Budget and Another with Read Access to ACTUAL
Now, create two DAPs for each Company Code. One DAP should have Read only access and another DAP must have Read and Write Access.
Now, as per your requirement assign these DAPs to the respective users. If you want you can go with more DAPs controlling read/write access to both CC and Scenario as well.
Let me know if you need more details. Thanks.
Regards,
Raj