Got my Hunter 350's second service (6-month) done and was charged ₹906. Does this seem right? How much did you pay for yours?

I recently got the second service (6-month) for my Hunter 350 and was charged ₹906. I wanted to check if this is the usual cost or if I got overcharged.

For future services what are the key things I should ask the service center to ensure I'm not being scammed or charged unnecessarily? Any tips or insights would be appreciated.