أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
3 times to the invested money
I think so. At the University of Economics in the industry we studied pricing activities landscaping, can be summarized in: materials + labor =%%.
Of course, that other items, such as transport, mechanization, storage, and other unforeseen costs are relative to individual cases and added to the sum%!
In the practice, however, are incl. more as:
% taxes, guarantee, reserves at difficulties in payments/ inside investments and others.