Grocery stores like Ralph's that stay open 24 hours a day give us the option of shopping at any hour. This means we're not cornered into going when it's convenient for everyone else, too, and you don't feel rushed while comparison shopping your way down the aisles. When you shop at an odd time, you're more likely to make good decisions about what to buy. Can you guess how much some of the items cost last time I shopped at 9 p.m. on a Wednesday?

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