The Notebook

Context:  My car is leaking neon green ectoplasm all over the driveway, so I take Hub's truck to run about town today.

Hubs: "You're going to have to get gas.  Make sure you remember to fill out the notebook!"
Me: "Totally.  Got it."
I log the date, odometer, trip gauge, gallons purchased, and dollar amount.
Hubs: "Uh...why does this say you paid $314.6 per gallon?"
Me: "Huh?  No, that was for the trip gauge."
Hubs: "Why would I write down the trip gauge when I already log the odometer?!"
Me: "I guess the same reason you would write down both the price per gallon, gallons purchased, AND the total dollar amount."
Hubs:  "No, no, no...writing down the price per gallon makes it much easier!"
Me: "Yeah, it was the price extended to 3 decimal points that I guess threw me."
Hubs: "I can't believe you didn't notice that every number in that column ended with a 9."