Counting overtime with a twist

Okay so the basics:

Each employee has a different plan time each day of the week.
Mon - 9 Tues - 9 Wed - 7 Thur - 8 Fr - 7

Overtime is really counted after 40

There are 5 sheets for each day of the week mon-fri lets say sheet1..2...3...etc, on each sheet there is a column a with plan and column b with actual hrs.

What I'm looking for is a summary sheet for each employee to see where they trend in OT after each day so...

person1 works 10 hrs on mon with a 9 hour plan thus 1 hr trending OT. On the summary page person1 would now show 1 hrs of OT. Now if they would work 9 hrs on tues it would still show 1 hr of OT. On wed however they worked 6 hrs so now the summary page would 0.

Hope this makes sense...thanks for the help.