Deneb Card containing Text + Bar Chart

Hello,

I'm trying to create a card using Deneb, the card should contain a Measure representing total revenue added as Text, and below it a bar chart that breaks the revenue by month.

I have created the bar chart with no problem, but when I add the Text Mark and add the measure to it, it is added to the chart as data points (which is not what I want)

This is my code:

{
  "data": {"name": "dataset"},
  "layer": [
    {
      "mark": {
        "type": "bar",
        "tooltip": true
      },
      "encoding": {
        "x": {
          "field": "Year Month short",
          "type": "nominal",
          "axis": null
        },
        "y": {
          "field": "Revenue",
          "type": "quantitative",
          "title": null,
          "axis": null
        },
        "color": {"value": "gray"}
      }
    }
  ]
}

 And this is the result

Desired result

Your help is so much appreciated.

Best regards,

Simon