Going to Costco for the first time this morning, I have no idea what to expect or what it’s like. I’m going with a member, and thought I’d pick up bulk buys of nappies and wipes, and eggs? (Do they sell eggs?!) but what else do I need? What is good? Is everything sold in huge amounts? So you can’t just buy some biscuits, you have to buy 500 packets of them?! Thanks!!