Railways have quite a few premium trains and special trains for 2014 and have introduced dynamic pricing in the premium trains. However, the pricing seems to be very odd - take for example the 04821 / JU SDAH PREMIUM - for 19th Oct Jp-Dhn 3AC ticket costs Rs 5400 as on 13.10.2014 while a 2AC costs Rs 3100. The logic is undefined.