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balance; difference (in price, cost); margin
予算との差額は自己負担となります。
The difference from the budget will be paid out of pocket.
売買の差額で利益を得るのが商売の基本だ。
Making a profit from the price difference is the basis of business.
為替レートの差額が旅行費用に影響する。
The exchange rate difference affects travel expenses.