public String printReturn(float price, String cardno, int qty, int qtyReturned) {
		NumberFormat formatter = NumberFormat.getInstance();
		formatter.setMinimumFractionDigits(2);
		formatter.setMaximumFractionDigits(2);
		
		float retTotal = qtyReturned * price;
		  
		String retType = cardno==null ? "CASH" : "CARD";
		String returnmsg=retType + " return: $" + formatter.format(retTotal);
		return returnmsg;
	}