Showing Text Value on bar charts

I have charts in my reports which uses a calculated value for plotting. Is there any way to show data returning from a database for a particular field to show it as a 'Text' on the bar chart instead of a plotted value, because it takes it as a plot values and gives different results.

Data Example: I have a formula which uses 'Col1' and 'Col2', and that formula is used for plotting on the chart, and I want to show the data from the 'Total' field on the bar chart.

Col1   Col2  Total

------    -----   -------

5          10     15

6          8          9

9          14     30

Thanks.