A store will sell a certain kind of clothing at a discount because of the change of season. If each clothing is sold at a 50% discount on the price, it will lose 20 yuan, while if it is sold at a 20% discount on the price, it will earn 40 yuan ① How much is the price of each dress? ② How much is the cost of each garment? ③ How much discount can I get at most to ensure no loss?

A store will sell a certain kind of clothing at a discount because of the change of season. If each clothing is sold at a 50% discount on the price, it will lose 20 yuan, while if it is sold at a 20% discount on the price, it will earn 40 yuan ① How much is the price of each dress? ② How much is the cost of each garment? ③ How much discount can I get at most to ensure no loss?

Set price x
The cost is y
50%x=y-20
80%x=y+40
x=200
y=120
3)120/200=60%
60% off for no loss