Costs are fixed in a Letter Contract. Payment of the pro-forma invoice is the beginning of business relationship. This is a confirmation that both sides work on the so-called "arme's-lenght", which is an indication of the objectivity of the financial analysis and forecal budgeting of the priject.

Service remuneration accorcibg to the Professional
Service Contract is included in the budgeting and will be
paid fron the credit loan.