function generatePrice() 
{   
	var p1 = document.getElementById("p1").innerHTML;
	var p2 = document.getElementById("p2").innerHTML;
	var p3 = document.getElementById("p3").innerHTML;
	var p4 = document.getElementById("p4").innerHTML;
	
	var n2 = document.getElementById("registration_n2").value;
	var n3 = document.getElementById("registration_n3").value;
	var n4 = document.getElementById("registration_n4").value;
	
	document.getElementById("total").innerHTML = p1*1+p2*n2+p3*n3+p4*n4;
}