Excel/Time calculation


I am doing a departure time calculation and need my answer to be restricted to business hours, how can i modify the formula to accomodate departure hours of 8:00AM to 5:00 PM? That is to say, If the calculated departure time is 03/24/2013 6:00 PM, then the formula would return 03/24/2013 5:00 PM, and if the calculated time is 03/24/2013 06:00 AM the formula would return 03/23/2013 5:00 PM. Simply put if the departure time is between 5:00 pm and 11:59 PM then return departure time as 5 PM on the same day, if the departure time is between Midnight and 8:00 AM then return answer should be departure previous day by 5:00 PM.


Please try the following formula (assuming the cell with the time to be modified is in A1):


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