Start. This column holds the time stamp for when you start working. Choose a time format like hh:mm AM/PM.
Stop. This column holds the time stamp for when you stop working. Same format as above.
Interval. Enter a formula subtracting Start from Stop. Choose a time format like hh:mm
Total. Beginning on the second line of the table, enter a formula adding the interval on this line to the interval from the line above. Format hh:mm
Now just enter your timestamps as you work and watch your totals grow. Begin a new line each time you start working after a break.
Note: formatting the cells with correct time formats can be tricky and is critical for getting sensible results. If you have trouble, refer to the programís help module on using time formats.