When is 27 cents an Omen?

The other day, I put $30 of gas in my car. Or at least, I tried to. The pump snapped off at $29.63, well short of full, and the computer in it took that as completion. It reset and wouldn't restart.

It wasn't worth the effort to worry about it; I simply went back to the cashier and got my 27 cents in change.

But then, on the rest of my drive in to work, I began to wonder: What does it mean? Or does it mean anything? It's a bit of a Rorschach test, I guess.