Translation of "Bucks" in Japanese

Lawyers make mega bucks when they win cases.

弁護士は裁判で勝つと巨額の報酬をもらえる。

- I paid about 50 bucks.
- I paid about 50 dollars.

私はおよそ５０ドル払った。

- I paid a matter of fifty dollars.
- I paid about 50 bucks.
- I paid about 50 dollars.
- I paid about fifty dollars.

私はおよそ５０ドル払った。