The quotation of prices includes net per month. Tradesmen outside of Germany must possibly consider the value added tax laws in their country.
There will be no other expenses.
The payment will be prepaid each year. The terms of a licence will be concluded indefinitely and can be written cancelled with a period of four month at the end of each contract year.
Example: One licence for Germany, Austria and Switzerland:
(25 + 12 + 12) x 12 months = 588 Euro net per year.