Question: Friend A bought 220 yuan worth of durian, Friend B bought 400 yuan worth of durian, and I bought 277 yuan worth of durian. What is the minimum amount I have to pay? (eg: Number (keep two decimal places) + yuan)
Clues:
1. The text "尝鲜价 .8折", which indicates a 20% discount (paying 80% of the price).
2. The text "满99减10 / 满199减25 / 满299减60", which indicates a tiered discount system.
Answer: 177.13 yuan
Category: Planning and Consumption