I just wrote up one massive rant, only to accidentally hit "back" instead of post.
Okay, so the gist of it is something about fuel. At the servo, in a four hour shift, about $3000 passes through my register. I serve about 150 people in that time. That's an average of $20 per person in fuel, though I'd say over half the customers purcahse over $30 worth, and about 20% over $60. What's always amazed me is just how ready these people are to part with their hard earned money. Today a farmer came through and put $170 of fuel in his Nissan Patrol, and didn't even want a tax reciept. That just blew me away. The sheer amount of cash involved in petrol is stupidifying.
Edit: Gah, I just realize that the $3000 average per shift is just cash. Well over half the customers purchase with debit or credit cards. Double the figures I said above and just fill in the blanks.