add amount of 2 time wage type into 3rd wage type and send to payroll

HI Guru,

Please guide me for given below query:

If emp work on  normal working day, then I am storing amount of Overtime in Time Wage Type 9005.

If emp work on  weekly off day, then I am storing amount of Overtime in Time Wage Type 9006.

So how can i store the amount of these 2 Time Wage Type into 3rd Wage type and then move the amount of 3rd Wage Type into PAYROLL.

Plse advice GURU.....

REgards,

Sharma