Please check your configuration table T510.
It should have the
Proper ESG groupings
Payscale area
Payscale Type
Payscale Group & Level
Wagetype with amount 4000( Variant B should have wagetype value)
Reduction method 2 in T511
Please verify and if still not resolved please post the screen shots of IT0008 screen and T510 table as well
Thanks
JIm