As far as economics is concerned, there are also two ways: the failure of the market and the cost of exchange.

经济学论证国家存在的必要性有两个进路：市场失灵说和交易成本说。

youdao

Our calculations of the cost of our trip were thrown out by changes in the exchange rate.

我们旅行费用的计算因为汇率变动而完全打乱了。

《牛津词典》

The point of the assault on Gaza, rather, is “to reduce the cost of a prisoner exchange” and to force Hamas to call a ceasefire in return for some calm.

而袭击加沙的意义倒是在于"降低交换囚犯的代价"，迫使哈马斯要求停火，以得到一些安宁。

youdao

The company attributes the red ink to expenses associated with the cost of listing on the American Stock Exchange and complying with the Sarbanes-Oxley Act, as well as development expenses in Kazakhstan.

FORBES: Magazine Article

One cause of Myanmar's financial mess is the cost of the army (see chart, which, by using the ludicrous official exchange rate, significantly understates the cost of imported weapons).

ECONOMIST: Myanmar

This would ensure that the federal cost of the Medicaid expansion population covered through Exchange plans is comparable to what it would have been had those individuals been covered through the Medicaid program.

FORBES: Arkansas: Replacing Medicaid Expansion with Obamacare's Exchanges Could Require 'No Additional Federal Costs At All'