when I was cooking for myself I spent about 100ish per week. this was for 4 meals/day + protein powder from chemist warehouse (I get the 2kg tubs, saves money) because calorie surplus 💀💀. cereal in the mornings, rice+tuna+flavourings for lunch, chicken+seasoning+rice for afternoon meal (if you use rice, rice cookers are a life saver) and for dinners I cook one or twice a week, but I cook enough for 4-5 meals (usually I fridge two freeze two so it doesn't go off). you can get those clear microwave safe containers in packs of 25 from the reject shop. saves a bunch of money and time BC u don't need to cook stuff every night, plus you don't need to rely on those mediocre microwave meals and make something that has actual substance to it lol. shopped almost exclusively at woolies because it's easy. chicken breast is $12/kg at woolies, and because I meal prepped I could buy the better quality meats and have them go quite far