The context of the following conversation is Austin and his best friend shared the same vehicle of transportation, Austin needed fruit for his lunch so he rode their bike to the grocery store.:
Austin says I was just at the grocery store to get some fruits..
The friend responds Did you drive the car or did you ride the bike?.
Austin responds I took the bicycle because my friend drove the car that we shared..
The friend responds At least you got the parts for lunch..
Austin responds I sure did. When my best friend comes home, I can use the  carto buy dinner..
The friend responds Seems like the sharing is working..