What would you do?

Wow it has been a long time since I blogged. Am not sure what I have been doing except trying to get ready for Christmas.
Here is my dilemma: I bought a shirt for Princess at Freddy's. Or so I thought. When I got home, I glanced at the receipt to see how much it was as it was on sale and it wasn't there. The lady didn't ring me up for it. Honestly, if it was a 1 or 2 dollar item, I probably wouldn't give it too much thought and if I had never looked at the receipt I never would have known I didn't get charged for it. But I feel bad. At the time I was not going to load the kids back up in the car, head to the store and go back and say "look you didn't charge me for this". But I still feel bad, like I stole it. I feel God telling me to do the right thing. I am leaning toward just carrying it into the store next time I go and adding it to my pile of groceries. That's my plan anyway. What would you do?