function doOrderCalculations(){

			$.blockUI({message:"<h2>Calculating Programs...</h2>"}); // overlay to block input
			var temp = ""; // temp variable for various algorithms
			var totalCount = 0;
			var totalAvails = $("#order-stations").find(".program").length;

			var offset = <? echo $weeks.";\r\n"; ?>
			<? for($a = 0;$a< $weeks;$a++){?>var week<? echo $a+6;?> = 0; // week <? echo $a+1; ?><? } ?>
			var totalweek = 0;

			/**** loop through each station ****/
			$("#order-stations").find(".station").each(function(){
				var station = $(this).attr("id");
				/**** then loop through each program for the station ****/
				$("#order-stations").find("."+station).each(function(){
					var viewers = $(this).find("td:eq(0)>.demo").val(); // get number of views from demo
					var rtg = $(this).find(".rating").text()*1; //get rating value
					var unitprice = $(this).find(".units").text() * 1; // get unit price

					/**** Obtain Ads per week ****/
					totalweek = 0;
					var unitx = 0;
					$(this).find("td").each(function(){
						var clss = $(this).attr("class");
						if(clss.match(/week/)){ // recurse week cells - qty of ads
							totalweek += $(this).html() * 1; //increment number of weeks
							temp = $(this).attr("class").replace(/programCell /,"");
							if ($(this).html() * 1 == 0){
								$(this).html("0");  // if is empty. make it 0
							}
						}
					});

					/**** Target Population ****/
					targetPop = $(this).find("td:eq(0)>.pop").val() * 1;
					if(viewers == 0 || viewers == "undefined"){
						viewers = rtg / 100  * targetPop;
					}
					/**** Calculate Reach and Frequency :: function reachCalc(weeks,rating) ****/
					var data = reachCalc(totalweek,rtg);
					var rf = data.split("&");
					$(this).find(".rch").html(rf[0]); // display reach
					$(this).find(".freq").html(rf[1]); // display frequency

					/**** GI ****/
					gi = totalweek * viewers;
					gi = gi.toFixed(1);
					$(this).find(".gi").html(gi); //display GI

					/**** CPP ****/
					var cpp = unitprice / rtg; // calculate CPP
					cpp = cpp.toFixed(2);
					$(this).find(".cpp").html(cpp); // display CPP

					/**** Total $ ****/
					var totd = totalweek * unitprice;
					totd = totd.toFixed(2);
					$(this).find(".totd").html(totd); // display total $

					/**** Total Spots****/
					$(this).find(".tots").html(totalweek); // display total spots

					/**** GRP ****/
					var grp = totalweek * rtg;
					grp = grp.toFixed(1);
					$(this).find(".grp").html(grp); // display GRP
				});
			});
			doOrderCalculationsTotals();
}

function reachCalc(numAds,rating){
	var GRP = rating * numAds;
	var freq = 	(0.1909 * numAds ) + 0.8091;
	if(freq > 0){
		var rch = GRP / freq;
	} else {
		var rch = 0;
	}
	rch = rch.toFixed(2);
	freq = freq.toFixed(2)
	return rch.toString()+"&"+freq.toString();
}