function calculateWeekly() {
	var squareMetres = validateNumber($F('squaremetres'));
	var basins = validateNumber($F('basins'));
	var toilets = validateNumber($F('toilets'));
	var days = $F('days');
	var cost = 0;
	var fixtureRate = 0.93;

	if(squareMetres == 0){
	  cost=0;
	 }
	else if	(squareMetres <500){
	cost = 28;
	}else{
		cost = ((squareMetres/500).toFixed(2) * 28);
	}
	cost = cost*days;

	cost = (cost) + ((basins * fixtureRate) + (toilets * fixtureRate));
	$('squaremetres').value=squareMetres;
	$('basins').value=basins;
	$('toilets').value=toilets;

	return cost;
}

function calculateMonthly() {
	return( calculateWeekly() * 4.4);
}

function calculateQuotes(){
	var weekly = (calculateWeekly()).toFixed(2);
	var monthly = (calculateMonthly()).toFixed(2);
	$('weekly').value = "$" + weekly;
	$('monthly').value = "$" + monthly;

}

function validateNumber(num){

		if(isNaN(num))
		{
			return 0;
		}else{
		 return num;
		 }
}