This looks like you did ok, I would check the prices on dried beans, those are usually cheap and a nutritional powerhouse. I strongly dislike the junk food you bought (personally) but don't think it's blowing up your budget. I make bread instead of buying it but that's because I like fancy bread.
Overall - if you are vegetarian not vegan, I think eggs, dry beans, brown rice, tomato paste would be good additions and I will add my voice to the chorus expressing dismay at your choice of canned green beans. If you are underweight, nuts too - expensive but so good and so many calories, healthy fat and protein.
If you are up north, it's a good time to start some seeds indoors, grow something you like to eat, if you are like me in a warm place, can start them outdoors now.