//Calculate Price
function calcPrice()
{
// var days = Number(document.getElementById("days").value);
 var pages = Number(document.getElementById("pages").value);
 var subpages = pages - 1;
 var totalPrice = 300;
 
 if (pages!=1 && pages!=0){
	  var totalSubs = subpages * 100;
	  totalPrice = totalSubs + 300;
 }

    document.getElementById('total-price').innerHTML = 'R$'+totalPrice;
}