function Calc() {
	document.forms[1].Total_Amount_Dinner_Dance.value = document.forms[1].Quantity_Dinner_Dance.value * 
		document.forms[1].Dinner_Dance_Cost.value;

	document.forms[1].Total_Amount_Table.value = document.forms[1].Quantity_Table.value * 
		document.forms[1].Table_Cost.value;

	document.forms[1].Total_Amount.value = (document.forms[1].Total_Amount_Dinner_Dance.value*1) + 
		(document.forms[1].Total_Amount_Table.value*1);
}