Hi, Please can you tell me what the following are in my remortgage nota simple under the section

RESPONSIBILIDAD HIPOTECA DE LA FINCA

a) intereses ordinarios This amount is 1800 euros, when do I pay this? Is this one of the costs of extending my mortgage that I have to pay now?

b) por los intereses de demora This amount is 4500 euros when do I pay this?

Many Thanks