“Stop buying pre-cut vegetables, meat, and shredded cheese. They’re like 75,439 times more expensive than their whole counterparts. Same goes for those pre-bagged salad kits.”
For people with certain disabilities, pre-cut veg and shredded cheese might be a necessity. If cost is the only factor, then you can certainly save by cutting out those items, but never feel bad about buying them if they improve your quality of life.