Thank you O Fortuna! Hehe guess it works!
Found a trolley with the dollar still in it just as we left the car park, it was abandoned as soon as we went outside because we saw the people take their stuff from the trolley and boarded their friend's car. Lucky us :)
$1 from trolley credited to her because she pushed it most of the way back to the trolley point.
Started with $118.90
Ended with $119.90
$1 from her
Wish me luck