You could say, " With the current exchange rate, going on a holiday would break the bank, there is no way I could afford it."

你可以说，“以目前的汇率，去度假会让我倾家荡产，我根本负担不起。”

When you go to the Western Union office, they'll calculate how much you'll have to pay according to the current exchange rate.

当你去西联汇款办公室时，他们会根据当前汇率计算你需要支付的金额。