{"answers": "B", "options": ["f : three belts cost $ 60 , so one belt is $ 20 . great !", "f : it 's a good deal to buy three ties for 72 dollars .", "f : well , a 20 % discount of 72 dollars is 57.60 dollars . you mean i can buy three ties at this price .", "f : oh , 90 dollars is too much for two ties ."], "article": "f : may i have a look at that tie , please ? what 's the price ? m : it 's $ 30 . but today we offer a 20 % discount if you buy more than 2 .", "id": "train_5932"}