Hourly.
I tried this:
SELECT TimeSheet.EID, Sum(TimeSheet.STDHours) AS SumOfSTDHours, Sum(TimeSheet.DTHours) AS SumOfDTHours, Sum(TimeSheet.OTHours) AS SumOfOTHours, DatePart("ww",[WDate],2) AS WeekEnd
FROM TimeSheet
GROUP BY TimeSheet.EID, DatePart("ww",[WDate],3);
The pay period runs...