/**
 * @author Dave Mauro
 */

function updatePrice(target) {
	var units = target.value * 1;
	var price = 0;
	if (units == 0) {
		price = 0;
	}
	if (units > 0 && units <= 100) {
		price = units;
	}
	if (units > 100 && units <= 200) {
		price = units * .9;
	}
	if (units > 200 && units <= 400) {
		price = units * .8;
	}
	if (units > 400 && units <= 700) {
		price = units * .7;
	}
	price = formatCurrency(price);
	if (units > 700) {
		price = "Please call";
	}
		
	$('#price').text(price);
}


function formatCurrency(num) {
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
		num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
		cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+
	num.substring(num.length-(4*i+3));
	return (((sign)?'':'-') + '$' + num + '.' + cents);
}