I have booked a SL ticket from SBC to Gulburga(GR) in Basava Express 17307. I want to extend the journey till Solapur (100km from Gulbarga). The fare from SBC to GR is Rs.235 and SBC to SUR(Solapur) is Rs.265. My question is can i pay the difference amount (265-235=30) and extend my journey to Solapur, provided the berth is available. OR else should i pay Rs.120 per person per berth from GR to SUR ? Please do reply..