How to account for accidentally resetting trip meter

[MarcGSR]

Hi,

I've been religiously tracking my family's fuel up since I signed up. Unfortunately, the dealership had Jen's car and reset the trip meter so I have no idea how many km were on that tank.

How can I add a new fuel up without messing up the data? When tracking with the trip meter, it asks you to enter 'Kilometers since last fuel-up'. However I have no idea what the km were of our last full fuel-up. I can't guess or enter 0 as it throws the numbers right off.

When tracking via odometer readings there is an option for a missed fuel up. Is there anything like this when a vehicle is set to track via trip meter? Selecting 'This is a partial fuel-up' wouldn't help as it was a full fuel-up.

Regards,

Marc