Translation of invoices - sworn translator

I am looking for a translator to translate my invoices.

These will be simple translations, I would do it myself, but I have a requirement that it must be done by a certified translator. So of course I will only consider offers from such people.

There will be 4 invoices (or 10, I'm waiting to hear - if 10, then these other 6 will be almost the same, only the amounts will change).

Please quote me a price for one invoice (1 page).

Since this is just a formality, I will be guided mainly by the price (provided, of course, that the condition of a certified translator is met).