1. Meal: Breakfast is almost the same as 4 yuan, about 1 1 yuan at noon and1/yuan in the afternoon. (If everyone eats in the canteen) Then it's almost 26 a day, even if it's 30 a day, sometimes it's overeating.
Then a month is 30×30=900.
Usually, I may eat less meals, so I reduced 100, so now it is 800.
2. Pay 100 yuan phone bill every month.
3. Pay the water and electricity fee 100 (our dormitory pays it in turn every semester, so we ignore this 100 first).
4. Other snacks, let's call it 100.
Maybe buy clothes or something, let's count it as 200.
Then the total is 800+100+100+200 =1200.
However, sometimes going out to have a meal together in the dormitory is another expense, so 1500 is the most appropriate, but the actual situation still depends on family conditions.