Remember, a trip is considered to be a one-way movement from a point of origin to a point of destination.  For example, if you leave your house to go to work, but stop for coffee and drop your kids off at school along the way, this would constitute three trips.  Then, if you leave work for lunch and return, this would be two more trips.  Finally, leaving work, stopping at a store for groceries, then reaching your home, this would be three trips.  Therefore, the daily total would be eight trips.