Sum multiple cells in a range to calculate overtime per week per staff

[Brook Trout]

I have over 100,00 lines of timesheet entries in Excel and would like to calculate how much overtime per week our team has done and to check the seasonality of the overtime. This is so I can try to make a business case to hire more staff.

Below is an example of our data. Most days have more than one time entry for each staff member. I have changed the date range to number value to hopefully make it easier to do the search for the range, but also found it easier to populate the date column. I'd like to have the names along a row at the top and the dates in a column along the left side. I can hide the numeric date and leave the calendar date there. It's for multiple years, so I will break up for each year.

My concept for the formula is

=(formula for summing multiple cells in a range per staff)-35

so I can get the overtime per week. I'm just not sure how to effectively sum multiple cells for a range for each staff.


Sample of current data:

Name	Date	Time Spent
Ada	42005	7.00
Alan	42005	7.00
Amy	42005	7.00
Doreen	42005	7.00
Ed	42005	7.00
Barb	42005	7.00
Helen	42005	7.00
Joanne	42005	7.00
John	42005	7.00
Lisa	42005	7.00
Manuel	42005	7.00
Mary	42005	7.00
Rose	42005	7.0
Pita	42005	7.00
Sveta	42005	7.00
Ada	42006	6.50
Ada	42006	1.00
Alan	42006	7.00
Amy	42006	8.00
Doreen	42006	7.50
Ed	42006	3.00
Ed	42006	3.50
Ed	42006	1.00
Barb	42006	2.50
Barb	42006	1.00
Barb	42006	2.00
Barb	42006	3.00

<tbody>
</tbody>

Current format for table for calculation:

			Ada	Alan	Amy
42001	42007	12/28 to 01/03
42008	42014	01/04 to 01/10

<tbody>
</tbody>

Thanks for any help or suggestions.

Brook Trout.

 

[steve the fish]

Hi. I copied your tables and pasted them into cell A1 of a new sheet. I then used this calculation in cell D61:

=SUMIFS($C$1:$C$54,$B$1:$B$54,">="&$A61,$B$1:$B$54,"<="&$B61,$A$1:$A$54,D$59)