Subtract date & time in diferent rows

We have some rules here. One of the them is:

(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post where your goal is to get an answer more quickly.

Don't break it again. Another issue is that you keep posting in the forum "Post Here to Contact Site Administrators and Moderators". That forum is not for technical questions, it's for issues with the site itself. Post your questions in an appropriate forum.

And by the way, putting conditions in like "Please Dont refer me to Datecalc as I want specific script to do so." is a good way to limit responses. When you're that selective you really need to hire an expert who will meet all of your demands.