Anyone know what is this octet in flyer xml?

example:

human 450/9003.20-6.20 lv10, gr1
c2010000 84030000 0a00 0100 03000000 0f000000 cdcc4c40 6666c640 0300 98 c3

450 fuel 900 fuel lv10 grade 1 combo id ??????? 3.20 speed 6.20 speed ?????? ??



idk that parts:
this isnt race depend or something, idk from where its coming, with minor changes i see no visible difference
0f000000 = ???


what i notice if i buy after each other the flyers the non lime part allways changeing even its same aviation, but too short number to beign time stamp
0300 98 c3 = ???