zìzhùcān yào wèn jiàgé, yòngcān shíjiān, értóng shōufèi, yǐnliào shìfǒu bāohán, làngfèi shìfǒu shōufèi

自助餐要问价格、用餐时间、儿童收费、饮料是否包含、浪费是否收费。

For a buffet, you need to ask about the price, meal time, children's charge, whether drinks are included, and whether there is a charge for waste.