title: HighCharts Pie Chart - Displaying multiple series values in Tooltip
body: <p>I'd like to build a pie chart using HighCharts that shows two values. The one is a the value upon which the percentage breakdown is based - call it unit. The other value is the cost value. I want to use a standard pie chart and not a Donut.</p>
  
  <p>When clicking on tooltip, I'd want to show the name value pair as per normal e.g. May, 15 units but then also display a $ value. e.g.:</p>
  
  <p>May: 
  15 units
  $63</p>
  
  <p>Is there anyway in a pie chart in highcharts to pull in a second data set. </p>
  
  <p>A Donut chart provide more flexibility but in this case the requirements is that the chart only displays the units and the tooltip displays the additional details.</p>