打うち金きん

noun

cash adjustment in barter; money to cover the difference in an exchange

Used when two items of unequal value are exchanged; the party receiving the higher-value item pays the difference in cash. This is a specialized term in barter or trade contexts.

• 中ちゅう古こ車しゃを交こう換かんするとき、打うち金きんとして5万まん円えんを支し払はらった。

  When exchanging used cars, I paid 50,000 yen as the cash adjustment.