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How should I do about it? Any idea? Currently I stay alone Here and didn't do cooking at home, 7am to 7pm job and there are easy food option . But I didn't finish all the food I order 99% of the time , I know! Very bad , just now for lunch I left a big chunck of chicken( and that's the only meat I order).

Oh, you might have a hard time doing it if you don't cook. I don't know your exact situation, but maybe think of a money amount that seems too little and try to live on less than that.