What's the biggest discount for seven days a day?

The daily discount for Duoduo Super Seconds is reduced by 15, 15, 50, 50, 50, 50, 50 and 50 for seven days respectively. 10% discount on the first day can be reduced up to 15 yuan; The next day, the maximum discount of 10% can be reduced 15 yuan; On the third day, a 20% discount can reduce the maximum 50 yuan; On the fourth day, the maximum discount of 7.5% can be reduced by 50 yuan; On the fifth day, the maximum discount of 30% can be reduced by 50 yuan; On the sixth day, the maximum discount of 6.5% can be reduced by 50 yuan; On the seventh day, a 5