func _costChart( comm: Double, margin: Double, expense: Double) {

    let yVals = BarChartDataEntry(x: 0.0, yValues: [comm, margin, expense ], icon: #imageLiteral(resourceName: "icon"))

    let set = BarChartDataSet(entries: yVals, label: "")

    let data = BarChartData(dataSets: set)

    costChart.data = data