Can you break a hundred dollar bill?
一百美元找得开吗?
Can you change a dollar bill?
我一块钱可以换零钱吗?
Do you have anything smaller
你没有面额小一点的吗?
Do you take credit card?
你们收不收信用卡?
Do you accept checks?
你们收支票吗?
Credit card is fine.
信用卡可以。