Reaction time
A-3 ~> S, 1550/1550
S ~> S-1, 1750/1750
Endurance
A ~> A-1, 1000/1000
http://www.narutosaga.com/t14365-the-stud-and-the-student-private-akira-training-no-kill#131302
Reaction time
S-1 ~> S-2, 2000/2000
S-2 ~> S-3, 2250/2250
http://www.narutosaga.com/t14495-newer-more-powerfull-styles-privte-akira-training-no-kill#131251
Speed
S ~> S-1, 1750/1750
Endurance
A-1 ~> A-2, 1150/1150
http://www.narutosaga.com/t14280-haru-and-hai-s-intensive-trainingtraining-from-e-to-d-ranking-in-statsno-killing#126598
1425 ryo for reaction time A-3 to S-3
525 ryo for Endurance A to A-2
350 ryo for Speed S to S-1
2300 ryo in total