Sir
I have already suggested at 10.55 reply today. Please follow and try.
This is KP26 screen only. If you want to calculate with system, you need to use KP06 (here we plan cost, in your case 300000) and KP26 (here we plan Activity quantity, in your case 10000) both for planning and then KSPI for plan rate calculation.
Regards
Rajneesh Saxena