It looks like this question has not been asked for a few year - so here's to hoping: 

Does anyone know if it is possible to calculate overtime based on two (or more) Pay Types?  For example, an employee works 35 hours of REG and 10 hours of TRVL.  Is there a way to automatically calculate overtime pay (he would have 5 hours of 1.5x regular pay overtime) based on these separate Pay Types.