我相信你买一个发卡只需花很少的钱。翻译成英文

have to pay, hair pin

I'm sure you only (have ) (to ) (pay )very little money on a (hair) (pin).

I believe you only need to buy a flower a few card issuers money

I'm sure you only (need ) (to ) ( spend)very little money on a (hair) (pin).

貌似hair pin是发针，hairpin发夹，不过好像也填不出别的词了
need to pay, hair pin