A: 我想换钱。 Wǒ xiǎng huànqián. I want to exchange money. B: 换多少钱? Huàn duōshao qián? How much money would you like to exchange? A: 一百美元。 Yı̄bǎi měiyuán. One hundred US dollars. B: 好的。 Hǎo de. All right.
