Grocery Store and Habitual Food

In my family, going to the grocery store is a rare occasion. Most of our food comes from leftovers or something that I was craving and just went out to get. we rarely have fruits or nuts much to my dismay. I have tried multiple times to get my parents to buy me some "natural" food but it always seems to be forgotten. It's also hard to eat healthy in a world like the one we live in. The only foods that are cheap are the junk food and fast food. If you want to eat healthy for cheap you actually have to go to the grocery store and pick out what you want, go home, make it, then you can eat, and hardly anyone really has time like that.