Calculating overtime

I am trying to create a timesheet that gives overtime daily over 8 hours and also over 40 hours per week. What kind of formula can I use for this?

Monday - 0 hours
Tuesday - 13.25 (8 Reg, 5.25 OT)
Wednesday - 12.5 hours (9.25 Reg, 3.25 OT)
Thursday - 20.25 hours (8 Reg, 12.25 OT)
Friday - 2.25 hours (2.25 Reg)
Saturday - 13.5 hours (8 Reg, 5.5 OT)
Sunday - 10 hours (4.5 Reg, 5.5 OT)
I have this formula for the weekly, but I need one for the daily:
=IF(G19>40, 40,G19)

Thank you!!