function calculate() {
	var cost1 = 150;
   	var cost3 = 2;
	var cost4 = 8;
	$('band1cost').value = $('band1quantity').value * cost1;
	$('combocost').value = $('comboquantity').value * cost1;
	$('ensembletotal').value = Number($('band1cost').value) + Number($('combocost').value);
	$('dayticketcost').value = $('dayticketquantity').value * cost3;
	$('nightticketcost').value = $('nightticketquantity').value * cost4;
	$('tickettotal').value = Number($('dayticketcost').value) + Number($('nightticketcost').value);
	$('grandtotal').value = Number($('ensembletotal').value) + Number($('tickettotal').value);
}