Assuming tweedle is required, the following result was found.
Date Customer Time From Time To Hours ---------- --------------- --------------- ---------------- -------------- 04/03/2011 Tweedle Dee 10:00 12:00 2.00 08/03/2011 Tweedle Dum 23:30 00:30 -23.00 Note the last row is obviously incorrect. This is because...