Sure, buying pre-sliced or pre-cut produce can save you a little time, but it definitely makes a dent in your wallet. These convenient produce products are some of the biggest mark-ups at the grocery store, so do it yourself and save big! The same goes for fruit, such as a small plastic tub of grapes, strawberries, or sliced apples. Their price per pound can be triple compared to the whole and take very little to no time to prepare. Try to leave yourself a bit of time to do it yourself, and it can make a big impact on your grocery budget.