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": 1724,
    "Quantity": 212
  }, {
    "Color": "red",
    "M": "March",
    "W": "Mon",
    "Time": "1000",
    "country": "USA",
    "state": "California",
    "city": "Los Angeles",
    "Price": "",
    "Quantity": 1319
  }];

function jsPivotCreationCompleteHandler() {
	var report = {
  	  configuratorActive: false,
			data: jsondata,
      rows: [{uniqueName: "Color"}],
      columns: [{uniqueName: "[Measures]"}],
      measures: [{uniqueName: "Price", format: "currency"}, {uniqueName: "Quantity"}],
      formats: [{name: ""/* for all measures*/, decimalSeparator: ",", thousandsSeparator: " ", currencySymbol: "", decimalPlaces: 0},
      {name: "currency"/* for measures with format='currency'*/, nullValue: "blank", decimalSeparator: ",", thousandsSeparator: " ", currencySymbol: "$", decimalPlaces: 2}]
  };
  flexmonster.setReport(report);
  console.log(flexmonster.getReport());
}

flexmonster.embedPivotComponent("https://s3.amazonaws.com/flexmonster/2.2/", "pivot-content", "100%", "600", {
  licenseKey: "Z53G-1T1WC3-1V1M-0L12-2M0A-1233-1I0Y-2Y2Q-1903-322S-0T2C-1I",
  jsPivotCreationCompleteHandler: "jsPivotCreationCompleteHandler"
}, true);