Excel - End Date/Time adding business hours

Hello.

I have a field with a start date and time (example 4/25/2012 11:00 am).
I would like to add business hours to determine the ending business date
and time.

Continuing with example, Business hours are 7am - 8pm.
I need 10 hours from Cell a1 start date/time 4/25/2012 11:00 am to give
me end date/time 4/26/2012 8:00 am

My worksheet layout
Start Date time - Cell a1
Business hours to add - Cell b1
End Date time - cell c1

I would love it if someone could help.  thanks in advance.




--
laya1024

Select A1.

RightClick -> Format Cells -> Custom.

Just under the Title Type: type the following:

m/dd/yyyy hh:mm AM/PM -> Click OK

You can drop the AM/PM if you want 24 hour time format instead of 12.

Copy A1 to C1.


Select B1.

RightClick -> Format Cells -> Time -> Select h:mm:ss PM



In C1 type the following:

=IF($A1="","",$A1+$B1)

Copy down to your desired amount of rows

HTH
Mick