You’re not the only one to hit the check-out line at the grocery store only to feel your eyes go wide at the total bill. So if you’re trying to cut back on expenses — and who isn’t? — try out these super easy ways to slash your tab at the supermarket: 1. Shop on a full stomach. Research has shown that hungry shoppers tend to make decisions they wouldn’t have made otherwise — like buying all those new snack foods that you know you don’t need. 2.