Morning: porridge+next meal (pickles)
Noon: cold kelp (cold shredded tofu), fried potatoes with green peppers, fried shredded pork with onions, and home-made tofu.
Evening: Eggplant powder (ants on the tree), fried spinach, chicken feather and egg soup (tomato and egg soup), shredded pork fried kidney bean and zucchini.
30 yuan should be enough. You can buy less shredded pork.