Those items were salaries, which are clearly understood by contract; commissions, which, again, are probably easily calculable; compensation for services rendered, which I guess is an uncertain amount but it could be calculated; and vacation pay, which, again, is clearly understood.
Il s'agit des salaires, qui sont clairement inclus dans le contrat; des commissions, qui sont sans doute faciles à calculer aussi; de la rémunération pour services rendus, dont le montant est sans doute incertain, mais qui pourrait être calculé; et de l'indemnité de vacances, qui est elle aussi clairement incluse.