Bar Graph Data Formatting - 10.2.2

[anupatil]

I'm using 10.2.2 Report Studio, have a bar graph and I'm showing values on the bar graph.
Showing x-axis as (weekly, monthly....) and Y-axis as invoice amount.
To show values on the bar graph, clicked on series and changes Chart Labels – show values settings and it worked.
I'm not able to format values what I'm showing on the bar graph.

Any help is appreciated!