YOU SAID:

i sold 5000 cups of coffee today

INTO JAPANESE

今日は5000杯のコーヒーを売りました

BACK INTO ENGLISH

I sold 5,000 cups of coffee today.

INTO JAPANESE

今日は5,000杯のコーヒーを売りました。

BACK INTO ENGLISH

I sold 5,000 cups of coffee today.