К сожалению, это будет невозможно с

К сожалению, это будет невозможно сделать, так как в данном случае мы работаем с тремя валютами (в договоре с экспертом доллары, у нас валюта рубли, у вас валюта евро).
Курс каждый день меняется, предугадать на будущее суммы мы не сможем, поэтому мы предлагаем оплачивать на дату выставления счета (у нас была оплата эксперту 14.10 курс доллара был 59 рублей = 501500 рублей, мы выставим вам инвойс в евро на курс от 14.10).
Прошу ваших комментариев.

Результаты (английский) 1:

Unfortunately, this would not be possible, as in this case, we are working with three currencies (in agreement with the expert dollars, we have a currency ruble, you have a euro currency).Rate changes every day, predict the future amount, we will not be able to, so we offer to pay on the date of the invoice (we had pay expert 14.10 USD rate was 59 rubles = 501,500 rubles, we will invoice you in euros at the rate of 14.10).Ask your comments.

Результаты (английский) 2:

Unfortunately, this is not possible, as in this case, we work with three currencies (in the contract with the expert dollars we currencies RUB, you Euro).
The course changes every day, to predict the future amount, we can not, therefore, we offer to pay on the date of the invoice (we had a payment expert 14.10 dollar rate was 59 rubles = 501,500 rubles, we will charge you an invoice in euro on the course from 14.10).
I ask for your comments.

Результаты (английский) 3:

unfortunately, it will be impossible to do so in this case we work with three currencies (in agreement with the expert's currency rubles, dollars, you have the currency euro).
course changes everydaywe can't predict the future amount, so we offer to pay on the date of the invoice (we had the expert as the dollar was 59 roubles = 501500 rubles, we will send you an invoice in the course of 14.10).
please your comments. "