Timesheets with cost ie overtime, time & half

Hellppp!!

I'm doing up a timesheet which has got 3 columns. It contains "Ordinary Hours", "Time & Half" and "Double Time".

I require a formula which calculates the cost automatically. If I put in 10 hours Mondays to Friday I need Excel to calculate 7.2hrs for Ordinary Hours eg $50, and 2 hours Time & Half $55 and 0.8 hrs $59 for Double time. I'll probably need one formula in a cell and the rest I'd probably be able to adopt the formula.

On Saturday it's first 2 hours for Time & Half and 8 hours on Double Time.

Would anyone be able to help me with this?

Regards

Euwest39