Please judge, which way of pricing is not good? A、A cup of coffee is priced at 24 yuan. Recharge for two cups and you will get one cup for free. B、One box of disposable medical masks with a set sale of 5 boxes costs 15 yuan; one box with a set sale of 20 boxes costs 50 yuan; and one box with a set sale of 50 boxes costs 98 yuan. C、The annual super VIP fee of the take-out app is 299 yuan, enjoying punctual arrival service, while the annual ordinary VIP fee is 88 yuan. D、A supermarket holds a grand bargain for opening of an online fresh food store, which regulates if you recharge 100 yuan and you can get 300 yuan free.