Here's the answer:
“对不起，只能付现金”
(duìbùqǐ, zhǐnéng fù xiànjīn)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- duìbùqǐ, zhǐnéngfùxiànjīn
- duì bù qǐ, zhǐ néng fù xiàn jīn
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 96.57% of the time!
