Inter state purchase & sale

Dear Expert

I am registered dealer in mumbai purchasing  material from supplier from Hydrabad against the C Form, by paying 2 % CST, with the predefined instruction to my hydrabad dealer to delivery material directly to my customer in mumbai.

Question.

1. Whether this transaction covered under 6(2) ?

2. How i will raised my invoice to my Cusotmer how is also in mumbai - Local VAT, CST (what %) or both.?

3. What are other compliances.?

Many thanks