function calculate()
{
	var sum = 0;
	//alert("!!!!!!!");
	
	//alert("!"+document.getElementById("fall_fun_campfire_site").value+"!");
	if(document.getElementById("party_barn_without_campfire").value != "" && document.getElementById("party_barn_without_campfire").value != null)
	{
		sum += 25;
	}
	if(document.getElementById("party_barn_with_campfire").value != "" && document.getElementById("party_barn_with_campfire").value != null)
	{
		sum += 60;
	}
	if(document.getElementById("party_room_without_campfire").value != "" && document.getElementById("party_room_without_campfire").value != null)
	{
		sum += 25;
	}
	if(document.getElementById("fall_fun_campfire_site").value != "" && document.getElementById("fall_fun_campfire_site").value != null)
	{
		sum += 50;
	}
	if(document.getElementById("wednesday_night_special_fall_campfire_site").value != "" && document.getElementById("wednesday_night_special_fall_campfire_site").value != null)
	{
		sum += 25;
	}
	//alert(sum);
	document.getElementById("sum").innerHTML = "$"+sum;
	sum = 0;
}