The minimum change of 5 yuan is at least 17 150 to 17 155. It is impossible to raise 5 yuan at least once.

An increase of 50 means an increase of 50 1 5 tons per ton, which means that you have to buy at least 5 tons 1 time. Increase by 50, earn 50 * 5 at least once = 250 yuan. This has nothing to do with the lowest price change, because it is already after the price change.

Of course, you have to pay so much compensation, and it also involves the issue of deposit, which is more complicated.