The Grocery Store Etiquette Test

Some of you may recall the strange affair of my Restaurant Etiquette Test, which was my excuse to diss all sorts of restaurant behavior under the guise of teaching you courtesy. Since I have departed the restaurant realm for the decidedly more prestigious world of the grocery store (sarcasm! Drip, drip!), I will now attempt to provide you with another lesson in manners. But this time I'll try to be nice about it.

Warning: This test covers a lot of material thoroughly. So give yourself some time before you begin.