Two customers made comments tonight to explain or justify their tips. One gave me $3.56, commenting about the price of gas. Then on my last trip of the night, a woman said "Well it is Saturday night, just keep the change," leaving me with $3.91. Only thing was, by that time it was actually Sunday morning.
I drove for 7 hours, took 18 runs, drove 63 miles, and made $47 in tips.