My Subconscious Is Getting Smarter

According to my subconscious, there is now a bill that's actually worth 1/8 of $10. Consider yourself warned.

Explanation: So, last night I had a very involved dream. When I woke up immediately afterward, the whole thing was vividly in my head. One part I distinctly remember was receiving change for something, where I was due $18.25 and I received the change entirely in bills. There were $17 in normal denominations and then there was a bill with an "8" on it which represented 1/8 of $10. I have no idea why, but it did. I remember waking up and thinking, "Wow! I never get the math right in my dreams!" Apparently, my subconscious is getting smarter.

Anyway, this morning all I can remember is that I got the math right. This xkcd sums it up: