It costs a certain amount of money to buy 50 Jin of flour, and fry fried dough sticks with flour. Now, the price of a fried dough stick is 1 50 yuan. Roughly speaking, A Jin with flour can fry 30 to 40 fruits at prices ranging from 45 yuan to 60 yuan. Take one as 50 yuan.

Fifty catties is 250 yuan, after deducting flour 50 yuan, it is 200 yuan. This is the least profitable, and it should be between 200 yuan and 350 yuan.