How do I cheaply carry a separate extra check-in bag in domestic flights in India? [duplicate]

I have booked a (return) ticket from Boston to New Delhi. In this flight, I'll be carrying two 23 kg bags. However, My destination is Kolkata. So, I'll be buying another (return) ticket from New Delhi to Kolkata, which is a domestic flight.

But most of the domestic flights in India does not allow two check-in bags. How do I manage to transfer the extra 23 kg bag?

I have checked with Jet Airways. They are saying that after the allowance of free check-in bag (23 kg with their US-payment site), I have to pay INR 300-500/kg. This will cost me huge for another 23 kg.

For Air India, they also do the same on the weight-basis, not on the piece-basis.

Any suggestions from the experienced people?