what i do is write up what i want to eat for breakfast lunch and dinner for the whole week and snacks, buy healthy stuff strawbeery and apples are going to cost you less than chips dips and ice cream , become a member of one of the stores so you can also save use coupons if you must and make sure not to buy to much food that it will go bad, if you have a room amte mabye you can to the shopping together!
dude just make spaghetti.. its hella cheap... like $2 bucks for noodles and like $3 for sauce. it will last you days too! thats what I do. walmart has cheap groceries and so does winco (if theres one around there). if you save up a little bit you can also buy packages of chicken breasts too for like $11 and those will last you probably a good 4-5 meals depending on how much you eat.