How Planned Cost getting caculated

I have setup workplan and assigned Resource (employee) to it, I have entered Planned hours and system has calculated the Planned cost , I have setup the Employee rate schedule and assigned at Task and Project level,

The Employee rate which I have setup does not contain rate for an Employee which I have assigned to Task in workplan

Please advise from where system derives the rates?? if it's not picked up from Employee rate for Planned costs calculations

Thanks