tí qián shuō qīng chǔ bǐ huí lái yǐ hòu zài suàn qián zì rán yě shǎo hěn duō gān gà

提前说清楚，比回来以后再算钱自然，也少很多尴尬。

Explaining clearly in advance is more natural than settling the money afterward, and it avoids a lot of awkwardness.