Selectively display data in a bar chart

I would like a bar chart to show bars for only one of the underlying data points (the mean). Under the chart, I'd like to see the underlying data (item count and $ total) in addition to the mean, as numbers. When I try to add the underlying data to get it to display under the chart (in the "caption" area), it appears in the bar graph as well. I've done the same thing with a line graph, although I'm wondering now if I've just gotten lucky in the past. Any help greatly appreciated.

(Should be a file attached but it's hard for me to tell whether it's actually there.)

Paul