Getting my oil changed...

Why do we make the decisions we do?
On Saturday we needed some stuff, some Superbowl stuff. Avocado's, ice cream, snacks, drinks, etc... I usually don't go to Walmart on Saturday's as a personal rule. Too many people, too much going on, lines are too long, too much chaos for me and my flow.
With that said as we pulled in to the parking lot Jen says "Oh pull around to the back, I need my oil changed" O.K. then...
So the nice man with super greasy hands comes to my window to assist us. He asks a couple questions, scans the inside of my car door for the VIN information and comments that my car is less than 1 year old. Just so you know, we bought it back in June so it's only 7 months old. The last question the nice man asked was "So what's the mileage?" To which I reply Eighty Five Thirty.
Now remember he is the one who stated that the car is under a year old...
After I give my mileage reply he says "so... Eighty Five Thousand and Thirty?" [Side note; That was funny because I would have to average 404 miles per day to achieve that kind of mileage!]
No, it's Eight Thousand Five Hundred and Thirty.
Anywho...we do our shopping...pay our bill...and return to the oil change facility...
No biggie, until this morning when I notice the oil change sticker that they place in the upper left corner of our windshield. It has been hand written...8830...I guess we'll go back tomorrow for another change...