The initial principal is $75,000 since this is the upfront amount that was loaned to the Jones and the payment is minus $2500 since the Jones are not reimbursing their loan but receiving $2500 per month for 60 months.
Le capital initial de 75 000 $ correspond à l'avance qui a été prêtée aux Dupont et le paiement est de moins 2500$, étant donné que les Dupont ne remboursent pas leur hypothèque mais reçoivnet 2500$ par mois pendant 60 mois.