A canteen for 50 people needs ingredients for one meat and one custom, with meat dishes 10 kg and vegetarian dishes of 20 kg. According to the three-two calculation, a person needs 15 Jin of rice.

It depends on how many dishes you prepare for each meal, and how to match vegetarian dishes with vegetarian dishes. Almost all people eat meat and vegetables. How many kilograms is the total? You can try it on the first day and the next day, and then adjust it if it is not suitable.