}
}
@Override
protected Money calculateDFAGratuityTotalAmountToPay(Event event) {
DfaGratuityEvent dfaGratuity = (DfaGratuityEvent) event;
return getDfaAmountPerEnrolment().multiply(
dfaGratuity.getRegistration().getEnrolments(dfaGratuity.getExecutionYear()).size());
}