H. P. Gas — cost difference

Address:

Mysore, Karnataka, 571304

Hi all,
Please see the below memos on hp gas booking and i found difference of rs. 220/-in comparison with aug and current booking. Am not sure why such difference and can anyone please explain.

Hpgas bookingno 597698 cashmemo 1019513 dt 09.08.17 rs.524.50, is generated. Ezygas authentication code is 9808, plz share it to dboy upon delivery

Hpgas bookingno 515438 cashmemo 1010101 dt 03.11.17 rs.744.50, is generated. Ezygas authentication code is 7588, plz share it to dboy upon delivery

Regards
Fairoz