Default Amount to Wage Types

Hi Friends,

I am working for international payroll but I am facing a problem in finding how the wage type valuation in done in infotype 0008, I checked in SPRO it is not done from wage type valuation or indirect valuation. Whenever creating infotype 0008 for a new employee based on his grade wage type values are coming automatically, despite of writing values manually system takes the predefined values, So how to find that how & where the valuation is done for these wage types.