From your example your data is set up as:
A B C D E F G H I J
1) DOW DATE Time In Break Out Break In Lunch Out Lunch in Break Out Break In Time Out
2) Sat 05/11/2013 9:07 AM 10:15 AM 10:30AM 1:12 PM 2:12 PM 3:39PM 3:54 PM 5:35 PM
You will need to add three more columns like:
K L M N
1) Total Hrs Break Lunch Actual Hrs
2) 8:28 0:30 1:00 6:58
In cell K2 enter the formula: =J2-C2
which give the TOTAL hours worked with no breaks
In cell L2 enter the formula: =SUM(E2-D2,I2-H2)
This gives us the Total Time used in the Two daily break periods.
In cell M2 enter the formula: =G2-F2
This gives us the Total time used for Lunch
In cell N2 enter the formula: =K2-(L2+M2)
This wraps everything up, and gives the Actual Time worked.
See how that works for you.