function calcSelfmed80(P,A,C) {
  return ((P*3622) + (A*3138) + (C*625));
}
function calcBasic(P,A,C) {
  return ((P*892) + (A*823) + (C*503));
}
function calcComprehensive(P,A,C) {
  return ((P*1991) + (A*1769) + (C*603));
}
function calcSelfsure(P,A,C) {
return ((P*1373) + (A*1350) + (C*464));
}
function calculate(form) {
  var P = 1;
  var A = form.numberOfAdults.value;
  var C = form.numberOfChildren.value;

  form.basicPremium.value = calcBasic(P,A,C);

  form.compPremium.value = calcComprehensive(P,A,C);

  form.selfsurePremium.value = calcSelfsure(P,A,C);

  form.selfmed80Premium.value = calcSelfmed80(P,A,C);
  


}