Taking Cuts At The Grocery Checkout [poll]

I was getting groceries yesterday with a cart full of stuff for a back yard BBQ when I woman got behind me with a Coke and a pack of gum.

Even I can do that math on that one. Letting her go ahead of me was the neighborly thing to do.

It got me to thinking... Just what is the cut off for letting someone cut in front? I don't think I would have been as generous if she had, say, 10 items to unload. What's your magic number?