I am having a problem in a MapRed script I am trying to finish as I am trying to pass a JS object between my Map and Reduce phase.... here is the code

function ItemCostData(itemid, cost, margin) {
        this.itemid = itemid;
        this.cost = cost;
        this.margin = margin;
        this.price = function() {
        	return (this.cost/((100-this.margin)/100)).toFixed(3);
        };
    }

    function map(context) {
    	try {
			var data = JSON.parse(context.value);
			var ispreferredvendor = data.values['formulanumeric'];
	    	if (ispreferredvendor == '1') {			
				var vendorcost = data.values["vendorcost"];
	    		var group = data.values["custitem_price_matrix_group"].value;
	    		var costdata = new ItemCostData(
	    			data.id,
	    			vendorcost,
	    			getMargin(group, vendorcost)
				);
	    		log.debug({'title':'Map Debug', 'details': 'Item ID: '+costdata.itemid+' Cost: '+costdata.cost+' Margin: '+costdata.margin})
	    		context.write(data.id, costdata);
	    	}
	    } catch(ex) {
	    	log.error({ title: 'map: error mapping data', details: ex });
	    }
    }

	function reduce(context) {
		try {
			log.debug({'title':'Context Value','details': context.value})
			var costdata = JSON.parse(context.value);
			log.debug({title: 'ItemId: '+costdata.itemid, details: 'Margin: '+costdata.margin+' Vendor Cost: '+costdata.cost+' Price: '+costdata.price()});		
			context.write(costdata.itemid, setItemPrice(costdata));
		} catch(ex) {
			log.error({ title: 'map: error mapping data', details: ex });
		}
	}