Yeah.  THE expense is mileage.  A friend of mine who does this will jump between jobs based on what's available.  People, take-out, groceries, whatever.  He even went through a certification process so now he can deliver wine and beer.  He has an app to track business mileage, might be too much of a stretch to get it broken down based on what's getting transported.  Bottom line, he gets paid to move X from point A to point B.