1) The travelling man-day would charge as agreed before (however, I presumed that usually I fly from Thailand on late evening and starting audit on next day morning, so 1.0 man-day charge is reasonable, but this case is different).
2) The first audit on Monday - Tuesday will spend 1.25 manday.
In this case I will loose 0.75 manday, on Tuesday.
So in this case based on 1) and 2) and would like to charge only 0.75 more manday (for travelling manday).