How....?

I went to Walmart today to buy antiperspirant. I was completely out. Not a good thing when the humidex is hovering around 33C! (ETA: Humidex has now hit 36C!) Normally, I don't shop at wally-world, but it is within walking distance from my house and with gas prices being what they are, I figured I could walk a bit. The item I needed was $2.67. Here is what I spent:

That's right, $51.82. How do I do this to myself? Budget? What's that?