Total hrs for each date based on max and min

Hello.  I appreciate any help on this.  I need to get total hours in each day based on the max and min in each day.  I tried a pivot table but it won't summarize it by day.  for each day i need to see the min date stamp and max date stamp.  then with another column showing the total hours between these two dates.  should I be using a pivot table?  and then paste the results as values to calculate the total hours for each day?  i welcome any and all ideas to make this simple.