Flexmonster Demo - empty values in JSON

HTML

<script src="https://s3.amazonaws.com/flexmonster/2.2/flexmonster.js"></script>
<div id="pivot-content"></div>

JavaScript

var jsondata = [{
    "Color": "green",
    "M": "September",
    "W": "Wed",
    "country": "Canada",
    "state": "Ontario",
    "city": "Toronto",
    "Price": 174,
    "Quantity": 22
  }, {
    "Color": "red",
    "M": "March",
    "W": "Mon",
    "Time": "1000",
    "country": "USA",
    "state": "California",
    "city": "Los Angeles",
    "Price": "",
    "Quantity": 19
  }];

var report = {
  	  configuratorActive: false,
			data: jsondata,
      rows: [{uniqueName: "Color"}],
      columns: [{uniqueName: "[Measures]"}],
      measures: [{uniqueName: "Price"}, {uniqueName: "Quantity"}],
      licenseKey: "Z51H-1I1HS1-0Y0X-0J0V-1528-0214-2H1R-1118-0C0Y-1H0K"
  };

flexmonster.embedPivotComponent("https://s3.amazonaws.com/flexmonster/2.2/", "pivot-content", "100%", "600", 
  report
, true);