Hello Buddy

In A2 I am having document despatched date and time and In B2 i am having Document delivered date and time,

In C2 I wants the time format 05:00:00.

Like
Despatched Time Delivered Time Time Left Esc.
02/22/2010 09:00:16 AM 02/22/2010 10:00:16 AM 04:00:44 00:00:00
02/22/2010 09:00:16 AM Pending 05:00:00 00:00:01

How to escalete the time period. If time period is more than 5 hours.

Thank you for your time

Moses