By Owner/Req Location allows you to see all your vehicles whether they have been used by your location or by another location.

Enter mileage for one trip or for multiple trips.  Once you have entered all the milage click to "Confirm Changes".  You may compute after each entry as a way to spot check the mileage against the estimated mileage; however, this is not required, all mileage will be calculated upon confirming your changes.  You will notice the orange "Pending Change" which is your indicator you have entered mileage for this particular trip.